The Light Fantastic
by Terry Pratchett
I love Pratchett. I have read many of his books by now (all in the Discworld series, I think), and I never cease to be amazed by his ability to write something completely and utterly silly, and, at the same time, that can carry so much satire and commentary on today's world. Seriously.
This is one of the earliest books in the Discworld series—the second book, perhaps?—with the marvelous characters of the inept wizard Rincewind and the irrepressible tourist Twoflower (who teaches Death to play bridge), and of course, Cohen the Aged Barbarian.
I will be reading Pratchett forever. I love this guy.