After much thought and with an eternally changing order:
1. A Farewell to Arms by Ernest Hemingway (misogyny notwithstanding)
2. One Hundred Years of Solitude by Gabriel Garcia Marquez
3. The Stranger by Albert Camus
4. A River Runs Through It by Norman Maclean (technically a novella)
5. Under the Volcano by Malcolm Lowry
6. The Bell Jar by Sylvia Plath
7. The Great Gatsby by F. Scott Fitzgerald
8. Slaughterhouse Five by Kurt Vonnegut
9. Moby Dick by Herman Melville
10. War and Peace by Leo Tolstoy (minus the political preaching)