It's always surprising how many of the great movies came from wonderful books.
Those are some of my favorite:
Blade runner, which came from "do Androids dream of electric sheep" by
Philip K. Dick
Lord of the rings (Tolkin)
Gone with the wind (
Margaret Mitchell)
Everything is Illuminated (Jonathan Safran Foer)
Perfume (I just saw the movie last week and it's great), the book is by Patrick Suskind
The Hours (Micheal Kunningham) - the movie is ased on a book which is a tribute to another book - Mrs. Dalloway by Virginia Woolf
Lord of the flies
Damn - there are just too many!