Ah, this might take a while! There' s no way I could list these in order, so here're a handful of my favorites...
The Princess Bride by William Goldman (this is my favorite book of ALL time)
The Book Thief and I Am the Messenger by Markus Zusak
His Dark Materials trilogy by Philip Pullman
The Wednesday Tales trilogy by Jon Berkeley
The Complete Sherlock Holmes, Volumes 1 and 2 by Sir Arthur Conan Doyle
Farenheight 451 by Ray Bradbury
Anansi Boys, Neverwhere, Stardust, American Gods, The Graveyard Book, Coraline, Smoke and Mirrors, Fragile Things, all by Neil Gaiman
Anything by William Shakespeare, but favorites include Hamlet, The Tempest, Romeo and Juliet, and Twelfth Night.
Fool on the Hill by Matt Ruff
Fight Club by Chuck Palanhuik
Abarat series by Clive Barker--by far the most imaginative thing I've ever come across, EVER. Blew my mind.
The Maltese Falcon by Dashiell Hammet
Grimm's Complete Fairy Tales by Jacob and Wilhelm Grimm
The Hobbit and The Lord of the Rings (1,2, and 3) by J.R.R. Tolkein
The Chronicles of Narnia by C.S. Lewis--all are brilliant, but my favorites are The Lion, The Witch and the Wardrobe, The Magician's Nephew, and most of all The Voyage of the Dawn Treader
There are a TON more that I haven't listed, but those are the first handful that come to mind...