Inspired by the Project Gutenberg Bookshelves, I've made a list of books available on Mobileread
sorted by genre. No mainstream literature titles, just Sci-Fi, Fantasy, Mystery/Suspense, Horror, Westerns, Adventure, Travel, Poetry, Humor, etc.
I haven't read all these books, so I have relied on the posters' descriptions of the books and/or the author's reputation. I'm sure there are some mistakes and omissions so let me know if you see any.