From radarrider and others.
At listofbests.com is this list of the 100 Science Fiction Books You Just Have to Read, reproduced below. I've divided them four ways, not three. Those I know I've read are bold, those I'm fairly sure I've read (but I'm not 100% certain) are bold italic, those I know I haven't read are struck out, and the few left plain I'm not sure about. Several errors by listofbests.com have been corrected.
- Childhood's End -- Arthur C. Clarke
- Foundation -- Isaac Asimov
- Dune -- Frank Herbert
- The Man in the High Castle -- Philip K. Dick
- Starship Troopers -- Robert A. Heinlein
- Valis -- Philip K. Dick
- Frankenstein -- Mary Wollstonecraft Shelley
- Gateway -- Frederik Pohl
- Space Merchants -- Frederik Pohl
- Earth Abides -- George R. Stewart
- Cuckoo's Egg -- C.J. Cherryh
- Star Surgeon -- James White
- The Three Stigmata of Palmer Eldritch -- Philip K. Dick
Radix -- A. A. Attanasio- 2001: A Space Odyssey -- Arthur C. Clarke
- Ringworld -- Larry Niven
- A Case of Conscience -- James Blish
- Last and First Men -- Olaf Stapledon
- The Day of the Triffids -- John Wyndham
- Way Station -- Clifford D. Simak
- More Than Human -- Theodore Sturgeon
- Gray Lensman -- E.E. "Doc" Smith
- The Gods Themselves -- Isaac Asimov
- The Left Hand of Darkness -- Ursula K. Le Guin
- Behold the Man -- Michael Moorcock
- Star Maker -- Olaf Stapledon
- The War of the Worlds -- H. G. Wells
- 20,000 Leagues Under the Sea -- Jules Verne
Heritage of Hastur -- Marion Zimmer Bradley- The Time Machine -- H. G. Wells
- The Stars My Destination -- Alfred Bester
- Slan -- A. E. Van Vogt
- Neuromancer -- William Gibson
- Ender's Game -- Orson Scott Card
In Conquest Born -- C. S. Friedman- Lord of Light -- Roger Zelazny
- Eon -- Greg Bear
- Dragonflight -- Anne McCaffrey
- Journey to the Center of the Earth -- Jules Verne
- Stranger in a Strange Land -- Robert A. Heinlein
Cosm -- Gregory Benford- The Voyage of the Space Beagle -- A. E. Van Vogt
- Blood Music -- Greg Bear
Beggars in Spain -- Nancy Kress- Omnivore -- Piers Anthony
- I, Robot -- Isaac Asimov
- Mission of Gravity -- Hal Clement
- To Your Scattered Bodies Go -- Philip Jose Farmer
- Brave New World -- Aldous Huxley
- The Man Who Folded Himself -- David Gerrold
- 1984 -- George Orwell
- The Strange Case of Dr. Jekyll And Mr. Hyde -- Robert Louis Stevenson
- Snow Crash -- Neal Stephenson
- Flesh -- Philip Jose Farmer
- Cities in Flight -- James Blish
- Shadow of the Torturer -- Gene Wolfe
- Startide Rising -- David Brin
- Triton -- Samuel R. Delany
- Stand on Zanzibar -- John Brunner
- A Clockwork Orange -- Anthony Burgess
- Fahrenheit 451 -- Ray Bradbury
- A Canticle for Leibowitz -- Walter M. Miller Jr.
- Flowers for Algernon -- Daniel Keyes
- No Blade of Grass -- John Christopher
- The Postman -- David Brin
Dhalgren -- Samuel R. Delany- Berserker -- Fred Saberhagen
- Flatland -- Edwin Abbott
Planiverse -- A. K. Dewdney- Dragon's Egg -- Robert L. Forward
- Downbelow Station -- C. J. Cherryh
- Dawn -- Octavia E. Butler
- The Puppet Masters -- Robert A. Heinlein
The Doomsday Book -- Connie Willis- The Forever War -- Joe Haldeman
- Deathbird Stories -- Harlan Ellison
Roadside Picnic -- Arkady Strugatsky- The Snow Queen -- Joan D. Vinge
- The Martian Chronicles -- Ray Bradbury
- Drowned World -- J.G. Ballard
- Cat's Cradle -- Kurt Vonnegut
- Red Mars -- Kim Stanley Robinson
- Upanishads -- Various
- Alice in Wonderland -- Lewis Carroll
- The Hitchhiker's Guide to the Galaxy -- Douglas Adams
- The Lathe of Heaven -- Ursula K. Le Guin
- The Midwich Cuckoos -- John Wyndham
- Mutant -- Henry Kuttner
- Solaris -- Stanislaw Lem
Ralph 124C41+ -- Hugo GernsbackI Am Legend -- Richard Matheson- Timescape -- Gregory Benford
- The Demolished Man -- Alfred Bester
War with the Newts -- Karl Kapek- Mars -- Ben Bova
- Brain Wave -- Poul Anderson
- Hyperion -- Dan Simmons
- The Andromeda Strain -- Michael Crichton
- Camp Concentration -- Thomas M. Disch
- A Princess of Mars -- Edgar Rice Burroughs
And if you're thinking, "Damn, there's not very many titles struck out in that list, are there?" ...Yeah, I was thinking the same thing.
no subject
84. Alice in Wonderland -- Lewis Carroll
Whiskey tango foxtrot, over?