In no particular order:
1. The Lord of the Rings, J.R.R. Tolkien
2. The Hobbit, J.R.R. Tolkien
3. The Silmarillion, J.R.R. Tolkien
4. Foundation series, Isaac Asimov - went *severely* downhill after the first three. Plus the whole psychohistory concept makes me incandescent with rage.
5. Robot series, Isaac Asimov - prefer this to the Foundation one actually though it doesn't seem to be as well known
6. Dune, Frank Herbert - first couple were the best. Also, as the series goes on there are too many Duncan Idahos.
7. Stranger in a Strange Land, Robert Heinlein
8. Earthsea series, Ursula le Guin - first three are possibly my favorite books of all time. Tehanu I was disapponted by when it came out, but it's grown on me. The last few are good reads but don't blow my socks off to quite the same extent.
9. Neuromancer, William Gibson - I know this is supposed to be a Great Work, but it left me a bit meh.
10. Fahrenheit 451, Ray Bradbury - definitely read this at least twice. Can't remember a damn thing about it though.
11. The Day of the Triffids, John Wyndham - Yay, John Wyndham and the End of the World. I think I prefer The Kraken Wakes to the Triffids though. Triffids are just a bit too silly.
12. A Book of the New Sun series, Gene Wolfe. Read, but not wowed
13. Discworld series, Terry Pratchett
14. Sandman series, Neil Gaiman
15. The Hitchhiker's Guide to the Galaxy, Douglas Adams
16. Dragonriders of Pern series, Anne McAffery - actually, isn't it McCaffrey ..? I loved these books sooo much when I was about 13. I still think they aren't as awful as they are made out, though I admit it is a long time since i read them.
17. Interview with the Vampire series, Anne Rice
18. The Shining, Stephen King
19. The Left Hand of Darkness, Ursula le Guin - yay, go UKLG!
20. The Chronicles of Amber, Roger Zelazny
21. 2001: A Space Odyssey, Arthur C. Clarke
22. Rendezvous with Rama, Arthur C. Clarke
23. Ringworld, Larry Niven
24. Elric of Melnibone series, Michael Moorcock
25. The Dying Earth series, Jack Vance
26. Lyonesse series, Jack Vance - I must confess though, I do tend to get Vances muddled up. The style is distinctive, but I find the plots tend to run together.
27. The Chronicles of Thomas Covenant, Unbeliever, Stephen Donaldson - I'm afraid so, but only because philmophlegm made me. They weren't quite as awful as I remembered from my first attempt to read them in my teens, but I still thought they were rather tedious.
28. A Song of Ice and Fire series, George R.R. Martin
29. The Worm Ourobouros, E.R. Eddison
30. Conan series, Robert E. Howard - well, a couple of, long ago. Don't ask me questions.
31. Lankhmar series, Fritz Leiber
32. Do Androids Dream of Electric Sheep?, Philip K. Dick
33. The Time Machine, H.G. Wells
34. The Invisible Man, H.G. Wells
35. The War of the Worlds, H.G. Wells
36. Eon, Greg Bear
37. Book of the First Law series, Joe Abercrombie
38. Miss Marple stories, Agatha Christie - though not since I was about 22, I think.
39. Hercule Poirot stories, Agatha Christie - as above
40. Lord Peter Wimsey stories, Dorothy L. Sayers - many times. Fabulous.
41. The Maltese Falcon, Dashiell Hammett
42. The Thirty-Nine Steps, John Buchan
43. Sherlock Holmes stories, Sir Arthur Conan Doyle
44. Cthulhu Mythos, H.P. Lovecraft
45. Inspector Wexford stories, Ruth Rendell
46. Adam Dalgliesh stories, P.D. James
47. Philip Marlowe stories, Raymond Chandler
48. The Godfather, Mario Puzo
49. The Day of the Jackal, Frederick Forsyth
50. The Fourth Protocol, Frederick Forsyth
51. Smiley series, John le Carre - Yay, Le Carre. I read these over and over until my copies of some of them fell apart. Then I bought new copies.
52. Gentleman Bastard series, Scott Lynch
53. The Malazan Book of the Fallen, Steven Erikson
54. Watchmen series, Alan Moore
55. Maus, Art Spiegelman
56. Batman: The Dark Knight Returns, Alan Miller
57. Persepolis, Marjane Satrapi
58. Harry Potter series, J.K. Rowling
59. Chrestomanci series, Diana Wynne-Jones
60. Ryhope Wood series, Robert Holdstock
61. Wilt series, Tom Sharpe
62. Riftwar Cycle, Raymond E. Feist
63. Temeraire series, Naomi Novik - some of. I lked the first one, but after that the premise started to seem a bit strained to me.
64. Chronicles of Narnia, C.S. Lewis
65. His Dark Materials series, Phillip Pullman - I laughed when I saw this and the one above listed together. I imagine that would make both authors very cross, but I can completely see why it makes sense to put them together.
66. Dragonlance series, Margaret Weis & Tracy Hickman - I think I read a couple. Not as terrible as they are made out. Decent reading if you have a bad cold and need something to distract your brain from the green slime without actually having to do anything much.
67. Twilight saga, Stephanie Meyer
68. The Night's Dawn trilogy, Peter F. Hamilton
69. Artemis Fowl series, Eoin Colfer - wel the first one anyway. Not impressed enough to read the rest
70. Honor Harrington series, David Weber - I think I read one. Light and fluffy, another good book for a day in bed.
71. Hannibal Lecter series, Thomas Harris
72. The Dark Tower series, Stephen King
73. It, Stephen King
74. The Rats series, James Herbert
75. Dirk Gently series, Douglas Adams
76. Jeeves and Wooster stories, P.G. Wodehouse
77. The da Vinci Code, Dan Brown
78. The Culture Series, Iain M. Banks
79. The Duncton series, William Horwood - Not bad, but doing Watership Down with spiritual moles didn't quite work for me. Actually, why is Watership Down not in here, that's the original!
80. The Illuminatus! trilogy, Robert Shea & Robert Anton Wilson
81. The Aberystwyth series, Malcom Pryce -
82. Morse stories, Colin Dexter
83. Navajo Tribal Police stories, Tony Hillerman
84. The Ipcress File, Len Deighton
85. Enigma, Robert Harris
86. Fatherland, Robert Harris
87. The Constant Gardener, John le Carre - I keep meaning to get round to this, it seems to be the one of his non-Smiley books that is the one to read....
88. The House of Cards trilogy, Michael Dobbs
89. The Dark is Rising saga, Susan Cooper - many times!
90. Psychotechnic League and Polesotechnic League series, Poul Anderson
91. Jurassic Park, Michael Crichton
92. Star Wars: Thrawn trilogy, Timothy Zahn
93. Ender's Game series, Orson Scott Card
94. Gormenghast series, Meryvn Peake - Love these. Inspired and mad.
95. Miles Vorkosigan saga, Lois McMaster Bujold
96. The Once and Future King, T.H. White
97. Fighting Fantasy books, Ian Livingston & Steve Jackson - only the original one, i think. Not sure these really count as novels.
98. The Stainless Steel Rat series, Harry Harrison
99. The Lensman series, E.E. 'Doc' Smith
100. The Cadfael stories, Ellis Peters - some of. They weren't compelling enough to make me want to read the rest.