I just finished Terry Pratchett's Carpe Jugulum and I laughed out loud. It is part of the Discworld series that I am slogging through bit by bit.
Other authors I like are Neil Gaiman, Dean Koontz, and Greg Isles. Some of the reads are stranger than fiction.
Another one that made me laugh was The Devil Wears Prada. The movie did not do the book justice.