Below are the top 46 books from http://www.whatshouldireadnext.com.
1. The Da Vinci Code - Dan Brown
2. The Catcher in the Rye - J.D. Salinger
3. The Hitchhiker's Guide To The Galaxy - Douglas Adams -- and the rest of the series
4. The Great Gatsby - F.Scott Fitzgerald -- 11th grade American Literature class. Witness why I don't like 20th century American Literature classes
5. To Kill a Mockingbird - Harper Lee -- If you haven't, read it.
6. The Time Traveler's Wife - Audrey Niffenegger
7. His Dark Materials - Philip Pullman -- currently reading through it. Pretty fun.
8. Harry Potter and the Half-Blood Prince (Harry Potter 6) - J.K. Rowling -- and the rest of the series
9. Life of Pi - Yann Martel -- currently reading through it
10. Animal Farm: A Fairy Story - George Orwell -- Woo hoo, Orwell!
11. Catch-22 - Joseph Heller -- Read it on a whim. It was ok. I probably wouldn't read it again, but I don't regret reading it.
12. The Hobbit - J. R. R. Tolkien -- I can't wait for Tolkien's translation of Beowulf to come out.
13. The Curious Incident of the Dog in the Night-time - Mark Haddon
14. Lord of the Flies - William Golding -- Another in a series of totalitarian/dystopian fiction readings I got in 10th grade. I love dystopic fiction.
15. Pride and Prejudice - Jane Austen
16. 1984 - George Orwell -- see above comments on Orwell and totalitarian fiction
17. Harry Potter and the Prisoner of Azkaban (Book 3) - J.K. Rowling -- again, the whole series
18. One Hundred Years of Solitude - Gabriel Garcia Marquez
19. Memoirs of a Geisha - Arthur Golden
20. The Kite Runner - Khaled Hosseini
21. The Lovely Bones - Alice Sebold
22. Slaughterhouse 5 - Kurt Vonnegut -- Yay Vonnegut!
23. Angels and Demons - Dan Brown
24. Fight Club - Chuck Palahniuk -- Palahniuk's work is very, very good, if post-modern in the extreme. It's a compelling read, and 10 times better than the movie.
25. Neuromancer - William Gibson
26. Cryptonomicon - Neal Stephenson
27. The Secret History - Donna Tartt
28. A Clockwork Orange - Anthony Burgess
29. Wuthering Heights - Emily Bronte
30. Brave New World - Aldous Huxley -- Again, totalitarian fiction. Hooray.
31. American Gods - Neil Gaiman
32. Ender's Game (The Ender Saga) - Orson Scott Card
33. Snow Crash - Neal Stephenson
34. A Prayer for Owen Meany - John Irving
35. The Lion, the Witch and the Wardrobe - C.S. Lewis -- And the rest of the series
36. Middlesex - Jeffrey Eugenides
37. Cloud Atlas - David Mitchell
38. The Lord of the Rings - J. R. R. Tolkien -- His Gawayne and the Grene Knighte translation was also done very well.
39. Jane Eyre - Charlotte Bronte -- Read it against my will for my English 696 course.
40. Good Omens - Terry Pratchett, Neil Gaiman -- I wish they would pair up for more books. They mesh so well together.
41. Atonement - Ian McEwan
42. The Shadow Of The Wind - Carlos Ruiz Zafon
44. The Handmaid's Tale - Margaret Atwood
45. The Bell Jar - Sylvia Plath