try
http://www.whatshouldireadnext.com
the idea is you put in the books you love and it narrows down choices based on what other people have read.
you can get recommendations on single books, or sign up (for free) and get better suggestions.
for example it recommends these books for fight club:
High Fidelity: A Novel - Nick Hornby
Black Swan Green: A Novel - David Mitchell
Zanzibar - Giles Foden
Travels in a Thin Country: A Journey Through Chile - Sarah Wheeler
The Ingenious Gentleman Don Quioxte De La Mancha Complete in Two Parts a New Translation By Samuel Putnam - Miguel de Cervantes Saavedra
To Cut a Long Story Short - Tony Hadley
War, Baby: The Glamour of Violence - Kevin Mitchell
The Long Round - Dominic Calder-Smith
Just Say the Word - Karen Field
Crossing the River - Caryl Phillips
