Fiction: Tolkien's trilogy
Non-fiction: Emerson's essays, first and second series
and
The Theory of Poker (yep, I'm a dork)

Arguments anyone? Anyone at all? <small>anyone????</small>

-wink-

:p Hey, I moderate this forum now, so watch out.

Also Pet Cemetary was a multiple read for me.

Actually, "dipdork" comes to mind...:D

I'd agree with others that mentioned Ender's Game and Tolkien's books.

I'm not sure if I'd really include it because it's fairly recent, but George R. R. Martin's A Song of Ice and Fire series blew me away, and seems to reveal new things (symbolism, foreshadowing, etc.) on repeated readings.

I read Stephen King's IT like twenty-five times throughout my year in the fifth grade...which might explain why I am the way that I am...

other books that I have read to shreds:

Every damn book by Stephen King
The Ultimate Hitchhiker's Guide - Douglas Addams
Good Omens - Neil Gaiman & Terry Pratchett
Chronicles Of Majipoor (The Lord Valentine Trilogy) - Robert Silverberg
The Accidental Tourist - Anne Tyler

-Any book worth reading is worth re-reading - do you really think you got it all the first time?-

For me:

Small Gods (By Terry Pratchett, part of the Discworld series)
The Stand (Stephen King)
The Princess Bride (William Goldman)

i 2nd that

Harry Potter- it makes me feel like a kid again:)
Also Catherine Coultier- the Bride trilogy, the Legacy trilogy, and one of my favorites- Nora Roberts' Homeport.
http://www.homestead.com/McHawkson/files/coolkitten.gif

I am just reading this for the first time as we speak. I am only 40 pages in and can already tell that it will occupy a spot in my "Top Ten Funniest Damn Things I Have Ever Read" list.

Re: the original question:

Catch-22
Watership Down
The Cyberiad (Lem)
Battle Cry of Freedom (James McPherson, the best single-volume treatment of the Civil War out there, IMHO).
Salem's Lot (King)
Lucifer's Hammer (Niven and Pournelle)
Dune
The English Patient (Ondaatje)
The Glitter Dome (Joe Wambaugh)