Wow, a lot of good recomendations in here. I LOVED Imajica!
Xng, I'm actually reading, and thoroughly enjoying, Split Infinity by Piers Anthony at the moment.
Scythan, you sound like you've read a lot of sci-fi type books already but, I'll go ahead and give you my recomendations. Have you read any Robert A. Heinlein? My favorites by him are: Stranger in a Strange Land and The Cat Who Walks Through Walls. Ender's Shadow and the ensuing books by Orson Scott Card were also good reads for me, and, of course, Imajica by Clive Barker.
When I'm done with The Apprentice Adept trilogy, I'd like to read Memoirs of a Geisha.