I have bolded those I really loved. Many of the others I just haven't got round to reading yet.
Douglas Adams : The Hitchhiker's Guide to the Galaxy
Brian Aldiss : Non-Stop
Isaac Asimov : Foundation
Margaret Atwood : The Blind Assassin
Margaret Atwood : The Handmaid's Tale
Paul Auster : In the Country of Last Things
JG Ballard : The Drowned World
JG Ballard : Crash
JG Ballard : Millennium People
Iain Banks : The Wasp Factory
Iain M Banks : Consider Phlebas
Clive Barker : Weaveworld
Nicola Barker : Darkmans
Stephen Baxter : The Time Ships
Greg Bear : Darwin's Radio
William Beckford : Vathek
Alfred Bester : The Stars My Destination
Ray Bradbury : Fahrenheit 451
Poppy Z. Brite : Lost Souls
Charles Brockden Brown : Wieland
Algis Budrys : Rogue Moon
Mikhail Bulgakov : The Master and Margarita
Edward Bulwer-Lytton : The Coming Race
Anthony Burgess : A Clockwork Orange
Anthony Burgess : The End of the World News
Edgar Rice Burroughs : A Princess of Mars
William Burroughs : Naked Lunch
Octavia Butler : Kindred
Samuel Butler : Erewhon
Italo Calvino : The Baron in the Trees
Ramsey Campbell : The Influence
Lewis Carroll : Alice's Adventures in Wonderland
Lewis Carroll : Through the Looking-Glass, and What Alice Found There
Angela Carter : Nights at the Circus
Angela Carter : The Passion of New Eve
Michael Chabon : The Amazing Adventures of Kavalier and Clay
GK Chesterton : The Man Who Was Thursday
Arthur C Clarke : Childhood's End
Susanna Clarke : Jonathan Strange and Mr Norrell (feel like double-bolding this)
Michael G Coney : Hello Summer, Goodbye
Douglas Coupland : Girlfriend in a Coma
Mark Danielewski : House of Leaves
Marie Darrieussecq : Pig Tales
Antoine de Sainte-Exupéry : The Little Prince
Samuel R. Delaney : The Einstein Intersection
Philip K. Dick : Do Androids Dream of Electric Sheep?
Philip K. Dick : The Man in the High Castle (should have been Scanner Darkly)
Thomas M. Disch : Camp Concentration
Umberto Eco : Foucault's Pendulum
Michel Faber : Under the Skin
John Fowles : The Magus
Neil Gaiman : American Gods
Alan Garner : Red Shift another double-bold
William Gibson : Neuromancer
William Golding : Lord of the Flies
Joe Haldeman : The Forever War
M. John Harrison : Light
Nathaniel Hawthorne : The House of the Seven Gables
Robert A. Heinlein : Stranger in a Strange Land
Frank Herbert : Dune
Hermann Hesse : The Glass Bead Game
Russell Hoban : Riddley Walker
James Hogg : The Private Memoirs and Confessions of a Justified Sinner
Michel Houellebecq : Atomised
Aldous Huxley : Brave New World
Kazuo Ishiguro : The Unconsoled
Shirley Jackson : The Haunting of Hill House
Henry James : The Turn of the Screw
PD James : The Children of Men
Richard Jefferies : After London; Or, Wild England
Gwyneth Jones : Bold as Love
Franz Kafka : The Trial
Daniel Keyes : Flowers for Algernon
Stephen King : The Shining
Frederik Pohl & CM Kornbluth : The Space Merchants
Marghanita Laski : The Victorian Chaise-longue
Joseph Sheridan Le Fanu : Uncle Silas
Ursula K. Le Guin : The Earthsea series
Ursula K. Le Guin : The Left Hand of Darkness
Stanislaw Lem : Solaris
Doris Lessing : Memoirs of a Survivor
MG Lewis : The Monk
CS Lewis : The Chronicles of Narnia
David Lindsay : A Voyage to Arcturus
Ken MacLeod : The Night Sessions
Hilary Mantel : Beyond Black
Richard Matheson : I Am Legend
Charles Maturin : Melmoth the Wanderer
Patrick McCabe : The Butcher Boy
Cormac McCarthy : The Road
Jed Mercurio : Ascent
China Miéville : The Scar
Andrew Miller : Ingenious Pain
Walter M Miller Jr : A Canticle for Leibowitz
David Mitchell : Cloud Atlas
Michael Moorcock : Mother London
William Morris : News From Nowhere
Toni Morrison : Beloved
Haruki Murakami : The Wind-up Bird Chronicle
Vladimir Nabokov : Ada or Ardor
Audrey Niffenegger : The Time Traveler's Wife
Larry Niven : Ringworld
Jeff Noon : Vurt
Flann O'Brien : The Third Policeman
Ben Okri : The Famished Road
George Orwell : Nineteen Eighty-four
Chuck Palahniuk : Fight Club
Thomas Love Peacock : Nightmare Abbey
Mervyn Peake : Titus Groan
Charlotte Perkins Gilman : Herland
John Cowper Powys : A Glastonbury Romance
Terry Pratchett : The Discworld series
Christopher Priest : The Prestige
Philip Pullman : His Dark Materials
François Rabelais : Gargantua and Pantagruel
Ann Radcliffe : The Mysteries of Udolpho
Alastair Reynolds : Revelation Space
Kim Stanley Robinson : The Years of Rice and Salt (should have been the Mars trilogy)
JK Rowling : Harry Potter and the Philosopher's Stone
Salman Rushdie : The Satanic Verses
Joanna Russ : The Female Man
Geoff Ryman : Air
José Saramago : Blindness
Will Self : How the Dead Live
Mary Shelley : Frankenstein
Dan Simmons : Hyperion
Michael Marshall Smith : Only Forward
Olaf Stapledon : Star Maker
Neal Stephenson : Snow Crash
Robert Louis Stevenson : The Strange Case of Doctor Jekyll and Mr Hyde
Bram Stoker : Dracula
Rupert Thomson : The Insult
JRR Tolkien : The Hobbit
JRR Tolkien : The Lord of the Rings
Mark Twain : A Connecticut Yankee at King Arthur's Court
Kurt Vonnegut : Sirens of Titan
Horace Walpole : The Castle of Otranto
Robert Walser : Institute Benjamenta
Sylvia Townsend Warner : Lolly Willowes
Sarah Waters : Affinity
HG Wells : The Time Machine
HG Wells : The War of the Worlds
TH WHite : The Sword in the Stone
Gene Wolfe : The Book of the New Sun
John Wyndham : Day of the Triffids
John Wyndham : The Midwich Cuckoos
Yevgeny Zamyatin : We
Angus Wilson : The Old Men at the Zoo
Virginia Woolf : Orlando
A lot of the others I liked a lot. About the only one there that I have read and was actually disappointed by is Weaveworld - perhaps just not my kind of thing.