I borowed a copy of this book from a friend, "Religoius Literacy: What every american needs to know, but doesn't" and I'd like to recomend it to anyone interested in religious topics!  It's by Stephen Prothero.

Sounds interesting.  I had a great book as a kid called "My Friend's Beliefs" that was a great introduction to world religion.  It got me really interested in the holidays my friends celebrated and things like that.