Alphabetized from this post

 

120 Days of Sodom, Marquis de Sade: rape, bestiality, torture, underage sex, and oh so much more

A Clockwork Orange, Anthony Burgess: rape, child rape

A Density of Souls, Christopher Rice: rape and underage sex

A Little Learning, Matthew Hughes: dub-con/rape

A Long Way Down, Nick Hornby: underage sex

A Midsummer Night's Dream, Shakespeare: bestiality

A Place to Call Home, Jackie French Koller: implied incest

A Rose For Emily, William Faulkner: implied necrophilia

A Spell of Winter, Helen Dunmore: incest

A Streetcar Named Desire, Tennessee Williams: rape

A Vision of Light, Judith Merkle Riley: underage sex/rape/incest.

Absalom, Absalom, William Faulkner.

Ada, or Ardor, Vladimir Nabokov: incest

Adam Bede, George Eliot: questionable consent

Aestival Tide, Elizabeth Hand: incest

Amazing Adventures of Kavalier and Clay, Michael Chabon: rape

American Gods, Neil Gaiman: underage sex and rape, prostitution. Polygamy. Almost-necrophilia. Would sex with a cat-god count as bestiality?

American Psycho, Brett Easton Ellis: rape, torture etc.

Amy and Isabelle, Elizabeth Strout: adult man/underaged girl relationship.

And Baby Makes Seven, Paula Vogel: intimations of underaged sex

Angels & Insects: Two Novellas, A.S. Byatt: incest

Annie on My Mine, Nancy Garden: more underage lesbianism

Annie's Baby: The Diary of Anonymous, a Pregnant Teenager, Beatrice Sparks: underage sex

Arabian Nights: incest, underaged sex

Ariel, Lawrence Block: underage sex, rape

Ariel, Stephen Brust: underage sex, maybe beastiality

As Meat Loves Salt, Maria McCann: multiple instances of rape

Ash: A secret history, Mary Gentle: child rape, underage sex, child prostitution, rape

At Swim, Two Boys, Jamie O'Neill: underage sex, sex between an adult and a minor

Atómstöin (The Atom Station), Halldór Laxness: underage sex

Babar by Jean de Brunhoff: incest (first-cousin marriage)

Baise-moi, Virginie Despentes: rape & subsequent violence

Baker's Boy Trilogy, J.V. Jones: incest

Barefoot Gen Bk 4, Keiji Nakazawa: gang-rape

Bastard Out of Carolina, Dorothy Allison: rape/molestation of underaged girl, several scenes of underaged girls masturbating, several scenes of underaged girl having BDSM fantasies.

Battle Royale, Koushun Takami: Teenage sex, violence, attempted rape and prostitution. The manga goes a hell of a lot further with all of this

Beast, Donna Jo Napoli: Graphic animal sex, sorta bestiality

Beauty, Sherri S. Tepper: underage sex, rape

Bee and Jacky, Carolyn Coman: incest

Belinda, Anne Rampling (Anne Rice): underage sex

Belinda, Anne Rice: underage sex

Beloved, Toni Morrison: bestiality

Black Dahlia, James Ellroy: incest

Blankets, Craig Thompson: rape, underage sex

Blood and Chocolate, Annette Curtis Klause: underage sex (adult and minor, between minors), implied incest, bestiality

Blood of the Walsungen, Thomas Mann: brother/sister incest

Bloodtide, Melvin Burgess: incest, bestiality

Boy Culture, Matthe Rettenmund: prostitution

Brave New World, Aldous Huxley: underage sex

Breakfast at Tiffany's, Truman Capote: implied underage sex

Candide, Voltaire: rape

Capitães da Areia, Jorge Amado: underage sex, pedophilia

Catalyst, Laurie Halse Anderson: child sexual abuse

Ceremony, Leslie Marmon Silko: underage sex

Cereus Blooms at Night, Shani Mootoo: incest and underage rape

Children of Dune, Frank Herbert: sibling incest heavily implied

Children of The Thunder, John Brunner: incest, rape

Christabel, Samuel Taylor Coleridge: girl on girl, child rape

Christy, Catherine Marshall: rape

Chronicles of Thomas Covenant, Stephen Donaldson: rape

City of Light, Lauren Belfer: rape

Clarissa, Samuel Richardson: rape

Claudine at School, Colette--underaged girl/girl relationships, underaged girl/grown woman flirting, underaged girl/grown man flirting and kissing.

Cloud Nine, Caryl Churchill: intimations of incest and underaged sex

Confesio Amantis, John Gower: incest

Confessions of a Mask, Yukio Mishima: objectification of teenage boys, sadism

Countless poems by Hjalmar Söderberg: prostitution.

Coyote Ugly by Lynn Siefer (stage play): incest, rape, and underage sex

Crashing Down, Meg O'Brien: incest

Crown of Silence, Storm Constantine: incest, rape

Cry to Heaven, Anne Rice: underage sex, plus some mild incest

Cyteen, CJ Cherryh: underage sex and group sex, rape, and acts which are arguably incestuous.

Darkover series, Marion Zimmer Bradley: underage sex and lots of incest, specifically twincest in The Forbidden Tower

Daughter of the Forest, Juliet Marillier: underage sex/rape

Death and the Maiden, Ariel Dorfman: rape, torture.

Death in Venice, Thomas Mann: younger boy objectification

Delta of Venus, Anaïs Nin: underage sex, incest

Der Vorleser, Bernhard Schlink: Underage sex, older woman/fifteen year old boy.

Deverry series, Katherine Kerr: brother/sister incest

Diplomacy of Wolves, Holly Lisle: rape

Diva, Nana, Luna, Lola, Vida and Alba, Daniel Odier (a.k.a. Delacorta): series depicting relationship between adult man/underaged girl, character takes artistic and clearly pornographic photographs of underaged girls.

Doctor Zhivago, Boris Pasternak: rape

Dolores Claiborne, Stephen King: child molestation

Donkeyskin, Robin McKinley: incest

Doubt, John Patrick Shanley: intimation of child molestation by priest, including an enabling parent

Dream Boy, Jim Grimsley: incest, sexual abuse and underage sex

Earth Children serie, Jean M. Auel: underage sex, rape

Equus, Peter Shaffer: bestiality

Even Cowgirls Get the Blues, Tom Robbins: underage sex

Exiles volume one: Runes of Ambrai, Melanie Rawn: whorehouses stocked with underage boys

Exposure, Kathryn Harrison: incest

Fade, Robert Cormier: incest

Fall On Your Knees by Ann-Marie MacDonald; incest, underage sex, pedophilia, rape

Fanny Hill: Memoirs Of A Woman of Pleasure, John Cleland: incest

Farnham's Freehold, Robert Heinlein: rape, slavery, cannibalism, racism, castration, implied slash.

Faust, Goethe: desire for an underage girl

Fiela's Child, Dalene Matthee: ambiguous incest

Flederfiction, Tony DeBlase (a.k.a. Fledermause): male rape, hardcore torture scenes, snuff.

Fool for Love, Sam Shepard: incest

Forever, Judy Blume: teenage sex

Forever, Judy Blume: underage sex

Frankenstein, Mary Shelley: incest (cousins raised as siblings)

Friday, Robert Heinlein: polygamy, polyandry, rape

Fruehlingserwachen (Spring's Awakening), Franz Wedekind: underage sex like woah

Fun Home: A Family Tragicomic, Alison Bechdel: underage sex, pedophilia.

Futz, Rochelle Owen: bestiality

Galactic Milieu series, Julian May: incest and majorly intergenerational interspecies procreation

Gap quintet, Stephen Donaldson: rape

Gate to Women's Country, Sherri S. Tepper: rape, underage sex, incest

Geek Love, Katherine Dunn: incest, questionable consent

Ghosts of Sleath, James Herbert: paedophilia.

Ghosts, Joanna Russ--rape

Glove Puppet, Neal Drinnan: underage sex, drug abuse, prostitution

Go Ask Alice, Beatrice Sparks: underage sex, drug abuse

Gone With the Wind, Margaret Mitchell: incest (first-cousin marriage)

Grandavegur 7, Vigdís Grímsdóttir: underage sex

Halfway Human, Carolyn Ives Gilman: graphic rape, underage sex, consensual and non-consensual sex with neuter characters (asexual humans with no gender-specific physical bodies, i.e. neither male nor female and incapable of arousal)

Hamlet, Shakespeare: incest (implied)

Hannibal, Thomas Harris: incestuous rape

Harry Potter and the Half-Blood Prince, J.K. Rowling: implied incest (the Gaunts)

Harry Potter and the Order of the Phoenix, J.K. Rowling: implied incest in the Black family

Haunted, James Herbert: implied incest

he Joy Luck Club, Amy Tan: underage marriage, rape,

Homo Faber, Max Frisch: incest

Honour Thy Father, Lesley Glaister: incest, implied rape

Hotel New Hampshire, John Irving: incest

House of the Spirits, Isabel Allende: underaged girl/adult man relationship, multiple rapes, mutilation, torture

How I Learned to Drive, Paula Vogel: adult man/underaged girl relationship

How I Learned To Drive, Paula Vogle: underage sex / consensual incest

How I Live Now, Meg Rosoff: underage incest

Huset med den blinde glassveranda (The House with the Blind Glass Porch), Herbjørg Wassmo: incest

I Know Why The Caged Bird Sings, Maya Angelou: child rape

I, Claudius and Claudius the God, Robert Graves: incest, and really just about everything else.

Ian McEwan, Atonement: Rape of an underage girl

Ian McEwan, The Cement Garden: incest, underage sex

Ian McEwan, The Comfort of Strangers: Roofies and Rape

In Cold Blood, Truman Capote: rape

Incarnation, Daniel Easterman: underage sex, snuff by autoerotic asphyxiation

Incest, Anais Nin: incest

Incest, Marquis de Sade: incest, etc.

Innocents, Kathy Coote: Underage sex, rape

Interview with the Vampire, Anne Rice: categorically pedophilia

Into the Woods, Jean Hegland: rape, incest

Invisible Man, Ralph Ellison: incest

It Happened to Nancy: By an Anonymous Teenager, Beatrice Sparks: underage sex

It, Stephen King: underage -- barely pubescent! -- group sex

Jacob Have I Loved, Katherine Patterson: underaged girl has strong (unreciprocated) sexual feelings for adult man

Jane Eyre, Charlotte Bronte: near-incest (Jane almost marries her first cousin)

John Ford's ''Tis Pity She's a Whore,' Angela Carter: incest

Jude the Obscure, Thomas Hardy: incest

Juliette, Marquis de Sade: likewise

Junk, Melvin Burgess: underage sex as well as drug abuse, vandalism, shoplifting, failure to report discovered dead bodies to the authorities

Just Above My Head, James Baldwin: incest.

Justine, Marquis de Sade: you name it

Kaffir Boy, Mark Mathabane: Pedophilia, underaged prostitution

Kafka on the Shore, Murakami: incest, underage sex

Kaleidoscope, Danielle Steele: rape, child molestation

Keeping You a Secret, Julie Ann Peters: underage lesbian sex.

King's Dragon, Kate Elliot: rape

Koolaids, Rabih Alameddine: underage (gay) sex

Kushiel's Dart, Jacqueline Carey: underage sex

Lady God, Lesa Luders: incest

L'amant, Marguerite Duras: underage sex

Laon and Cythna, Percy Shelley: incest

Lasher, Anne Rice: incest, underage sex, pedophilia

Le Morte d'Arthur, Thomas Malory: incest

Les enfants terribles, Jean Cocteau: incest

Les faux-monnayeurs, Andre Gide: incest and underage sex

Les Liaisons Dangereuses, Pierre Choderlos de Laclos: sexual blackmail/rape of underaged girl.

L'immoraliste, Andre Gide: underage sex

Little Altars Everywhere, Rebecca Wells: child molestation, implied incest

Little Birds, Anaïs Nin: underage sex, incest

Livets Døtre series, May Grethe Lerum: rape, incest

Lolita, Vladimir Nabokov: underage sex

Lord Satan, Louisa Bronte: underage sex, rape

Lost Girls, Alan Moore and Melinda Gebbie: incest, pedophilia, bestiality

Lost Souls, Poppy Z Brite: underage sex, incest

Love Curse of the Rumbaughs, Jack Gantos: explicit Incest.

Love in a Cold Climate, Nancy Mitford: child abuse

Lucky, Alice Sebold: rape

Mabinogian (medieval Welsh collection of legends): incestuous noncon genderswap bestial mpreg

Macho Sluts, Pat Califia: male and female rapes, BDSM, torture, incest, underaged girl/grown woman relationship, you name it.

Magician, Raymond E. Feist: heavily implied underage shenannigans

Maia, Richard Adams: incest, rape, child prostitution

Malice, Danielle Steele: rape, incest

Manfred, Lord Byron; incest

Mansfield Park, Jane Austen: incest (first-cousin marriage)

Master, Angela Carter: rape.

Mathilde, Mary Shelley: incest

Melusine and The Virtu, Sarah Monette: rape, underage sex, prostitution, hint at incest

Melusine, Lynn Reid Banks: incest, rape

Memoirs of a Geisha, Arthur Golden: underage sex

Meridon/The Wideacre Triology, Philippa Gregory: incest

Merlin Trilogy, Mary Stewart: incest

Metamorphoses, Ovid: rape, incest, bestiality

Middlesex by Jeffrey Eugenides; incest, underage sex

Mignon, Chris Hunt (sex with a minor)

Mists of Avalon, Marion Zimmer Bradley: Incest.

Moll Flanders, Daniel Defoe: incest

Moon Tiger, Penelope Lively: incest

Music and Silence, Rose Tremain: incest

My Secret Life, Anonymous (an extremely important work of Victorian pornography): you name it, it's in there

My Sister in this House, Wendy Kesselman: incest, underage sex

Myrin (Tainted Blood), Arnaldur Indriason: rape

Mysterious Skin, Scott Heim: pedophilia and rape

Mystery Ride, Robert Boswell: grown woman/underaged girl relationship, sex between two underaged teens.

Mystic River, Dennis Lehane: pedophilia and rape

Naked Lunch, William S. Burroughs. Pretty much everything, up to and including lots of paedophilia and snuff and murder

Nekotopia, Asuka Fujimori: implied underage sex

No Longer Human, Osamu Dazai: rape

Now and Then, William Corlett: underage (gay) sex, rape

Obsidian Butterfly, Laurel K Hamilton: a teenage boy has forced sex with a woman

Ondskan/The Evil, (Swedish) Jan Guillou: underage sex, child abuse

One for the Money, Janet Evanovich: rape

One Hundred Years of Solitude, Gabriel Garcia Marquez: incest

Oranges are Not the Only Fruit, Jeanette Winterson: underage sex

Oryx and Crake, Margaret Atwood: lots and lots of mentions of child pornography and snuff films

Outer Dark, Cormac McCarthy: incest, woman has her brother's child

Outlander series, Diana Gabaldon: rape, possible incest

Pamela, Samuel Richardson: rape

Perfect Match, Jodi Picoult: underage sex

Pericles, William Shakespeare: incest

Persusasion, Jane Austen: incest (first-cousin marriage)

Peyton Place, Grace Metalious: underage sex and incest

Phedre, Racine: incest

Pierre, or the Ambiguities, Herman Melville: incest

Pierre: Or the Ambiguities, Herman Melvile: brother/sister incest.

Portrait of a Child Bride on Her Honeymoon, Richard Brautigan: underage sex

Princess Daisy, Judith Krantz: incestuous rape

Property Of, Alice Hoffman: rape, possibly of underaged girl (character's age is unclear)

Push, Sapphire: incest, underaged sex, rape, involuntary impregnation, and tons of other abuse

Reading Lolita in Tehran, Azar Nafisi: Molestation, rape, pedophelia, mentions of bestiality

Regina's Song, David and Leigh Eddings: incestuous themes

Ring, Koji Suzuki: rape

Rise of Gawain, Nephew of Arthur, Anonymous: rape

Romeo and Juliet, Shakespeare: underage sex (Juliet is 13/14)

Roots, Alex Haley: repeated rape of underaged girl, implication of many other rapes.

Rose in Bloom, Louisa May Alcott: incest (first-cousin marriage)

Rubyfruit Jungle, Rita Mae Brown: underage sex

Sagen om Isfolket series, Margit Sandemo: rape, incest and underage sex

Salem Falls, Jodi Picoult: incest and underage sex

Salka Valka, Halldór Laxness: rape, underage sex

Sanctuary, William Faulkner: rape.

Satyricon, Petronius: you name it, it's in there

Sea Dragon Heir, Storm Constantine: incest, rape

Sepulchre, James Herbert: rape.

Set in Stone, Linda Newbery: incest

Set This House In Order, Matt Ruff: incest, childhood sex abuse

Shame, Salman Rushdie: incest

Sherlock in Love, Sena Jeter Naslund: incest

She's Come Undone, Wally Lamb: rape, underage sex.

Shogun, James Clavelle: underage prostitution

Silk Road, Jeanne Larsen: underage sex

Sins of the Blood, Kristine Kathryn Rusch: incest

Sjálfstætt fólk (Independent People), Halldór Laxness: incest, underage sex, rape

Slammerkin, Emma Donoghue: incest

Sleepers, Lorenzo Carcaterra: Child abuse

Songs of the Humpback Whale, Jodi Picoult: incest, plus some more strongly implied incest, underage sex

Sons and Lovers, D.H. Lawrence: incest

Sophie's Choice, William Styron: rape

Speak, Laurie Halse Anderson: rape

Speaking with the Angel, ed. Nick Hornby: homosexual prison rape, underage sex

Spring Moon, Bette Bao Lord: uncle/adult niece incest.

Star Wars: A New Hope novelization, George Lucas: implied twincest

Stardust, Neil Gaiman: implied underage sex, even between a minor couple.

Strange Bedfellows, Randi Kreger: incest

Stranger in a Strange Land, Robert Heinlein: group sex, cannibalism

Street Lavender, Chris Hunt: sex with a minor

Sword of Truth series, Terry Goodkind: rape

Táin Bó Cúailnge (medieval Irish collection of legends): you name it, but especially incest

teach me, R.A. Nelson: underage sex between a teacher and student

Teleny, Oscar Wilde: rape

Tess of the d'Urbervilles, Thomas Hardy: dubious consent

The Alienist, Caleb Carr: child prostitution, abuse, sexualized serial murder of children

The Amber Spyglass, Philip Pullman: underage sex

The Apprentice, Scooter Libby: something involving a prepubescent girl and a bear in a cage

The Basketball Diaries, Jim Carroll: Child abuse

The Bible: incest, underage sex, rape, child abuse, abuse of women

The Big Sky, A. B. Guthrie: rape (possibly statutory)

The Birthday of the World And Other Stories, Ursula K. LeGuin: incest(?), polygamy, many depictions of deviant sexuality and social morals that some may find offensive

The Black Jewels Trilogy, Anne Bishop: underage sex, child prostitution, rape, incest

The Bluest Eye, Toni Morrison: incest, rape

The Bone Parade, Mark Nykanen: rape, underage sex

The Book of Ruth, Jane Hamilton: incest

The Books of Paradys, Tanith Lee: underage sex, pedophilia, rape, incest

The Brothers Bishop, Bart Yates: incest, pedophilia, underage sex

The Carnivorous Lamb, Agustin Gomez-Arcos: Very underage sex, incest

The Catch Trap, Marion Zimmer Bradley: underage (gay) incest

The Catcher in the Rye, J.D. Salinger: prostitution

The Catchtrap, Marion Zimmer Bradley: underage sex

The Cenci, Percy Shelley: incest

The Chosen, Ricardo Pinto: underage sex, incest, rape, graphic violence, torture (including maiming and deliberate emotional and physical trauma)

The Collector, John Fowles: kidnap, rape, murder

The Color Purple, Alice Walker: rape and incest

The Company of Wolves, Angela Carter: underage sex, quasi bestiality

The complete works of V.C. Andrews: incest, underage sex

The Conference of the Birds, Farid Ud-Din Attar: adult/Child sexual interaction and romance

The Crown of Stars series, Kate Elliot: rape etc

The Cure for Death by Lightning, Gail Anderson-Dargatz: incest, rape, bestiality

The Dark Tower series, Stephen King: underage sex, mentions of rape

The Dead Rivers Trilogy, Naomi Kritzer: rape, underage rape, child abuse, incest(?)

The Debutantes, June Pflaum Singer: father/daughter incest, rape, underaged girl/adult woman relationship, underaged girl rapes another underaged girl with a Coke bottle

The Deluge at Norderney, Isak Dinesen: a character tells a story-within-story which mentions a man purchasing a virgin of twelve years and making plans to deflower her.

The Education of A Maiden, Anonymous: Underage incest

The End of Alice, A.M. Homes: pedophilia, underage sex, homosexual prison sex and rape

The Executioner's Beautiful Daughter, Angela Carter: rape, father/daughter incest, brother/sister incest, family violence/murder.

The Faerie Queen, Edmund Spenser: bestiality (group sex with satyrs. Satyrs!)

The Fall of the House of Usher, Edgar Allan Poe: incest

The Fantasticks, Tom Jones & Harvey Schmidt: uses the word rape in the archaic sense of an abduction, but there's still a whole damned song devoted to singing its praises. (Stage play.)

The Final Opus of Leon Solomon, Jerome Badanes: underaged, incest.

The Fionavar Tapestry, Guy Gavriel Kay: rape

The Fog, James Herbert: pedophilia

The God of Small Things, Arundhati Roy: incest, child molestation

The Golden Ass, Apuleius: bestiality

The Gossip Girl series, Cecily von Ziegesar: teenage sex

The Handmaid's Tale, Margaret Atwood: rape, forced prostitution

The Hanged Man, Francesca Lia Block: incest

The Happy Hooker, Xaviera Hollander: prostitution

The Heart is a Lonely Hunter, Carson McCullers: underage sex

The Heart is Deceitful Above All Things, JT Leroy: pedophilia, rape

The Heart of a Witch, Judith Hawkes: incest, underage sex

The Heart of the Forest, Angela Carter: incest, underage sex

The Hippopotamus, Stephen Fry: bestiality

The Holdfast Chronicles (series) by Suzy McKee Charnas: graphic violence, rape, abuse, incest, bestiality

The Holy Innocents, Gilbert Adair: incest

The Holy Sinner, Thomas Mann: incest

The House of Gentle Men, Kathy Hepinstall: rape, and LOTS of sex with a minor

The House Tibet, Georgia Savage: rape, incest and underage sex

The Illuminatus Trilogy, R.A. Wilson. Pretty much everything, implied or otherwise.

The In Death series, J.D. Robb: incest

The Infernal desire Machines of Dr. Hoffman, Angela Carter: rape, implied father/daughter incest, bestiality

The Iron Dragon's Daughter, Michael Swanwick: underage sex

The Jonah, James Herbert: ends with possibility for necro-incest

The Kentucky Cycle, Robert Schenkkan: repeated rape, mutilation, forced pregnancy, infanticide.

The Kiss, Kathryn Harrison: incest

The Kite Runner, Khaled Hosseini: rape

The Knight of the Sword, Anonymous: implied incest (father, daughter), attempted rape by sword

The Langoliers, Stephen King: pedophilic rape

The Library Policeman, Stephen King: Child molestation/rape

The Lovely Bones, Alice Sebold: underage sex/rape and murder.

The Magic Toyshop, Angela Carter: incest

The Manchurian Candidate, Richard Condon: incest

The Marketplace series, Laura Antoniou: technically consensual sex slavery, but also contains several rapes

The Master Builder, Henrik Ibsen: paedophilia (strongly implied)

The Monk, Matthew Gregory Lewis: rape and incest

The Name of the Rose, Umberto Eco: underage sex, rape

The Night Listener, Armistead Maupin: child abuse, pedophilia, kiddie porn

The Oedipus plays, Sophocles: incest

The Once and Future King, T.H. White: incest

The Orphan's Tales: In the Night Garden, Catherynne M. Valente: rape, incest, animal sex, underage sex, forced marriage

The Other Boleyn Girl, Philippa Gregory: incest

The Painted Bird, Jerzy Kozinski: rape.

The Perks of Being a Wallflower, Stephen Chbosky: underage sex, underage gay sex, pedophilia

The Persian Boy, Mary Renault: rape, underaged sex, castration, sexual slavery

The Petty Demon, Fyodor Sologub: underage sex, bdsm, corruption of youth, pretty boy crossdressing as a geisha

The Problem of Susan, Neil Gaiman: bestiality

The Psalms of Herod, Esther Friesner: underage sex and rape

The Rape of Lucrece, William Shakespeare: rape

The Real Tom Brown's School Days, Chris Kent: underage sex

The Realms of the Gods, Tamora Pierce: a relationship between a 16 year old girl and a 30 year old man

The Ring of the Niebelungs (medieval German epic, also an opera cycle by Wagner): incest

The Robber Bride, Margaret Atwood: child molestation/rape

The Romance of Lust, Anonymous: incest, pedophilia

The Sandman, Neil Gaiman: Rape, necrophelia, incest, pedophelia

The Secret History, Donna Tartt; incest

The Silmarilion and The Children of Hurin, J.R.R. Tolkien: incest.

The Silmarillion, JRR Tolkien: incest

The Sisterhood Of The Traveling Pants, Anne Brashares: underage sex

The Sky Lords, John Brosnan: sexual harassment, dub-con

The Sleeping Beauty Trilogy, Anne Rice: underage sex, slavery

The Song of Ice and Fire series, George R.R. Martin: Rape and incest

The Sound and the Fury, William Faulkner

The Sparrow, Mary Doria Russell: rape, forced prostitution

The Speaker of the Dead, Orson Scott Card: incest

The Squire's Tale, Geoffrey Chaucer: incest

The Standing Dead, Ricardo Pinto: underage sex, incest, rape, graphic violence, torture (including maiming and deliberate emotional and physical trauma)

The Story of the Eye, Georges Bataille: underage sex, mutilation

The Tale of Genji (Genji Monogatari), Murasaki Shikibu: rape, underage sex

The Tale of the Miller's Daughter, JoSelle Vanderhooft: Underage sex is mentioned in passing,rape and torture.

The Teahouse Fire, Ellis Avery: child abuse

The Time Traveler's Wife, Audrey Niffenegger: underage clone-cest

The Tin Drum, Günter Grass: sex with a minor

The Unbearable Lightness of Being, Milan Kundera: polygamy, hints of incest (desire towards a teenage step daughter)

The Vampire Armand, Anne Rice: categorically pedophilia

The Virgin Suicides, Jeffrey Eugenides: incest

The War Zone, Alexander Stuart: incest, child abuse and rape.

The Wars, Timothy Findley: rape in the military

The Wayfarer Redemption series, Sara Douglass: multiple instances of rape and canonical justification for an entire family perpetuated largely through incest

The Werewolf of Paris, Guy Endore: incest

The Wind-Up Bird Chronicles, Murakami Haruki: prostitution and rape

The Winter Prince, Elizabeth E. Wein: mother/son incest (implied brother/brother)

The Witching Hour (and sequels), Anne Rice: incest, underage sex, mixing sex with Jesus-like characters

The World of Susie Wong, Richard Mason: child prostitution

They Live on Levels, Terry Carr: underage sex

Thumbelina, H. C. Andersen: implied bestiality

Tigana, Guy Gavriel Kay: Incest.

Time Enough for Love, Robert Heinlein: incest (brother/sister, son/mother), children of incest, attempted rape, polygamy, polyandry

'Tis Pity She's a Whore, John Ford: incest

Tithe, Holly Black: implied underage sex

Titus Andronicus, William Shakespeare (disputed): rape

Tne Passion of New Eve, Angela Carter: rape

To Die For, Joyce Maynard: adult woman/underaged boy relationship

To Sail Beyond the Sunset, Robert Heinlein: incest (brother/sister, son/mother, daughter/father), attempted rape, polygamy, polyandry

Tom Jones, Henry Fielding: implied/mistaken incest

Trainspotting, Irvine Welsh: underage sex, dead cocaine baby!

Treacherous Love: The Diary of an Anonymous Teenager, Beatrice Sparks: underage sex

Tree of Crows, Lewis Davies: incest

Troilus and Cresyde, Geoffrey Chaucer: incest

Two Girls, Fat and Thin, Mary Gaitskill: incest, underage, abuse; contains a scene where one teenage girl sexually assaults another with a toothbrush.

ulie of the Wolves, Jean Craighead George: rape

Uncle Vampire, Cynthia Grant: incest

Valdemar series, Mercedes Lackey: rape

Vanishing Acts, Jodi Picoult: underage sexually-based child abuse (this may be a stretch as there's no confirmed sex and it's her stepfather, not her natural parent, doing the abusing)

Vathek, William Beckford: child molestation, incest

Viewfinder, Yamane Amano: rape, rape, rape

Warchild, Karin Lowachee: underage rape, child abuse, graphic violence

Wasteland, Francesca Lia Block: incest

Watch Your Mouth, Daniel Handler: incest

Watchmen, by Alan Moore and Dave Gibbons: rape

Way of Light, Storm Constantine: incest, rape

We So Seldom Look on Love, Barbara Gowdy: necrophilia.

When Jeff Comes Home, Catherine Atkins: pedophilia

Where Late The Sweet Birds Sang, Kate Wilhelm: incest, clone-cest

White Horses, Alice Hoffman: brother/sister incest, intimations of rape

White Oleander, Janet Fitch: gay sex with a minor

Wilhelm Reich in Hell, Robert Anton Wilson: rape, underage sex

Winter Birds, Jim Grimsley: incest and sexual abuse

Wise Children, Angela Carter: incest

Without Remorse, Tom Clancy: graphic rape and torture of a possibly underage girl

Wizard and Glass, Stephen King: underage sex, a minor girl being sold to and sexually assaulted by an elderly man

Wuthering Heights, Emily Bronte: possible inces, forced marriage

Yellow Dog, Martin Amis: rape, underage sex, will make you never want sex again