According to the BBC, the following are the top 100 books in the UK (at least, as of April 2003) and, like everyone else, I'm commenting on what I've read.
1. The Lord of the Rings, JRR Tolkien NO
2. Pride and Prejudice, Jane Austen YES
3. His Dark Materials, Philip Pullman NO
4. The Hitchhiker's Guide to the Galaxy, Douglas Adams YES
5. Harry Potter and the Goblet of Fire, JK Rowling NO
6. To Kill a Mockingbird, Harper Lee NO
7. Winnie the Pooh, AA Milne NO
8. Nineteen Eighty-Four, George Orwell YES
9. The Lion, the Witch and the Wardrobe, CS Lewis YES
10. Jane Eyre, Charlotte Brontë YES
11. Catch-22, Joseph Heller NO
12. Wuthering Heights, Emily Brontë NO
13. Birdsong, Sebastian Faulks NO - nor have I ever heard of it...
14. Rebecca, Daphne du Maurier NO
15. The Catcher in the Rye, JD Salinger NO
16. The Wind in the Willows, Kenneth Grahame NO
17. Great Expectations, Charles Dickens YES
18. Little Women, Louisa May Alcott YES
19. Captain Corelli's Mandolin, Louis de Bernieres NO
20. War and Peace, Leo Tolstoy NO
21. Gone with the Wind, Margaret Mitchell NO
22. Harry Potter And The Philosopher's Stone, JK Rowling NO
23. Harry Potter And The Chamber Of Secrets, JK Rowling NO
24. Harry Potter And The Prisoner Of Azkaban, JK Rowling NO
25. The Hobbit, JRR Tolkien NO
26. Tess Of The D'Urbervilles, Thomas Hardy NO
27. Middlemarch, George Eliot NO
28. A Prayer For Owen Meany, John Irving YES
29. The Grapes Of Wrath, John Steinbeck NO
30. Alice's Adventures In Wonderland, Lewis Carroll NO
31. The Story Of Tracy Beaker, Jacqueline Wilson NO
32. One Hundred Years Of Solitude, Gabriel García Márquez YES
33. The Pillars Of The Earth, Ken Follett NO
34. David Copperfield, Charles Dickens NO
35. Charlie And The Chocolate Factory, Roald Dahl YES
36. Treasure Island, Robert Louis Stevenson NO
37. A Town Like Alice, Nevil Shute NO
38. Persuasion, Jane Austen NO
39. Dune, Frank Herbert NO
40. Emma, Jane Austen NO
41. Anne Of Green Gables, LM Montgomery YES
42. Watership Down, Richard Adams NO
43. The Great Gatsby, F Scott Fitzgerald NO
44. The Count Of Monte Cristo, Alexandre Dumas NO
45. Brideshead Revisited, Evelyn Waugh NO
46. Animal Farm, George Orwell NO
47. A Christmas Carol, Charles Dickens YES
48. Far From The Madding Crowd, Thomas Hardy NO
49. Goodnight Mister Tom, Michelle Magorian NO
50. The Shell Seekers, Rosamunde Pilcher NO
51. The Secret Garden, Frances Hodgson Burnett YES
52. Of Mice And Men, John Steinbeck YES
53. The Stand, Stephen King YES
54. Anna Karenina, Leo Tolstoy NO
55. A Suitable Boy, Vikram Seth NO
56. The BFG, Roald Dahl YES
57. Swallows And Amazons, Arthur Ransome NO
58. Black Beauty, Anna Sewell NO
59. Artemis Fowl, Eoin Colfer NO
60. Crime And Punishment, Fyodor Dostoyevsky NO
61. Noughts And Crosses, Malorie Blackman NO
62. Memoirs Of A Geisha, Arthur Golden YES
63. A Tale Of Two Cities, Charles Dickens NO
64. The Thorn Birds, Colleen McCollough NO
65. Mort, Terry Pratchett NO
66. The Magic Faraway Tree, Enid Blyton NO
67. The Magus, John Fowles NO
68. Good Omens, Terry Pratchett and Neil Gaiman NO
69. Guards! Guards!, Terry Pratchett NO
70. Lord Of The Flies, William Golding YES
71. Perfume, Patrick Süskind NO
72. The Ragged Trousered Philanthropists, Robert Tressell NO
73. Night Watch, Terry Pratchett NO
74. Matilda, Roald Dahl YES
75. Bridget Jones's Diary, Helen Fielding YES
76. The Secret History, Donna Tartt NO
77. The Woman In White, Wilkie Collins NO
78. Ulysses, James Joyce NO
79. Bleak House, Charles Dickens NO
80. Double Act, Jacqueline Wilson NO
81. The Twits, Roald Dahl NO
82. I Capture The Castle, Dodie Smith NO
83. Holes, Louis Sachar NO
84. Gormenghast, Mervyn Peake NO
85. The God Of Small Things, Arundhati Roy YES
86. Vicky Angel, Jacqueline Wilson NO
87. Brave New World, Aldous Huxley NO
88. Cold Comfort Farm, Stella Gibbons NO
89. Magician, Raymond E Feist NO
90. On The Road, Jack Kerouac NO
91. The Godfather, Mario Puzo NO
92. The Clan Of The Cave Bear, Jean M Auel YES
93. The Colour Of Magic, Terry Pratchett NO
94. The Alchemist, Paulo Coelho NO
95. Katherine, Anya Seton NO
96. Kane And Abel, Jeffrey Archer NO
97. Love In The Time Of Cholera, Gabriel García Márquez NO
98. Girls In Love, Jacqueline Wilson NO
99. The Princess Diaries, Meg Cabot NO
100. Midnight's Children, Salman Rushdie NO