Inspired by Daily Telgraph's list of the 50 best cult books. I was surprised how many I've read, even as I don't necessarily agree with their choices. Here is their list. Italicize the ones you've read all the way through. Underline the ones you haven't finished. Comments extra.
Slaughterhouse-Five by Kurt Vonnegut (1969) Still prefer other Vonnegut.
The Alexandria Quartet by Lawrence Durrell (1957-60)
A Rebours by JK Huysmans (1884)
Baby and Child Care by Dr Benjamin Spock (1946) Who hasn't dipped into this?
The Beauty Myth by Naomi Wolf (1991)
The Bell Jar by Sylvia Plath (1963)
Catch-22 by Joseph Heller (1961) Saw the movie...
The Catcher in the Rye by JD Salinger (1951) Read it as an adult, so didn't like it.
The Celestine Prophecy by James Redfield (1993)
The Dice Man by Luke Rhinehart (1971)
Chariots of the Gods: Was God An Astronaut? by Erich Von Däniken (1968) Dumb and not fun
A Confederacy of Dunces by John Kennedy Toole (1980)
Confessions by Jean-Jacques Rousseau (1782)
The Private Memoirs and Confessions of a Justified Sinner by James Hogg (1824)
Dianetics: the Modern Science of Mental Health by L Ron Hubbard (1950)
The Doors of Perception by Aldous Huxley (1954)
Dune by Frank Herbert (1965) A great book, though you can skip the sequels
The Hitchhiker’s Guide to the Galaxy by Douglas Adams (1979) A great radio production (etc.) and the sequels are worthy.
The Electric Kool-Aid Acid Test by Tom Wolfe (1968) A great bit of journalism
Fear of Flying by Erica Jong (1973)
The Female Eunuch by Germaine Greer (1970)
The Fountainhead by Ayn Rand (1943) What an awful book.
Gödel, Escher, Bach: an Eternal Golden Braid by Douglas R Hofstadter (1979) Currently in the middle of a second attempt to get all the way through
Gravity's Rainbow by Thomas Pynchon (1973) Still not sure if I like it
The Holy Blood and the Holy Grail by Michael Baigent, Richard Leigh and Henry Lincoln (1982) and sequels
I Capture the Castle by Dodie Smith (1948)
If on a Winter’s Night a Traveller by Italo Calvino (1979)
Iron John: a Book About Men by Robert Bly (1990)
Jonathan Livingston Seagull by Richard Bach and Russell Munson (1970)
The Magus by John Fowles (1966)
Labyrinths by Jorge Luis Borges (1962)
The Leopard by Giuseppe di Lampedusa (1958)
The Master and Margarita by Mikhail Bulgakov (1967)
No Logo by Naomi Klein (2000)
On The Road by Jack Kerouac (1957) I really hate this book. Bad people doing bad things. Almost killed any appreciation of the Beat Generation for me.
Fear and Loathing in Las Vegas by Hunter S Thompson (1971)
The Outsider by Colin Wilson (1956)
The Prophet by Kahlil Gibran (1923)
The Ragged Trousered Philanthropists by Robert Tressell (1914)
The Rubáiyát of Omar Khayyám tr by Edward FitzGerald (1859)
The Road to Oxiana by Robert Byron (1937)
Siddhartha by Hermann Hesse (1922) Read it in HS, too early.
The Sorrows of Young Werther by Johann Wolfgang von Goethe (1774)
Story of O by Pauline Réage (1954)
The Stranger by Albert Camus (1942) Read it in HS, too early.
The Teachings of Don Juan: a Yaqui Way of Knowledge by Carlos Castaneda (1968)
Testament of Youth by Vera Brittain (1933)
Thus Spoke Zarathustra by Friedrich Wilhelm Nietzsche (1883-85)
To Kill a Mockingbird by Harper Lee (1960) Saw the movie...
Zen and the Art of Motorcycle Maintenance: an Inquiry into Values by Robert M Pirsig (1974) A great book once you grok that the author is an asshole.