Mr. Usurper: the da vinci code is a nice book, a nice detective-like book with some puzzles in them which the main persons in the book have to solve

the puzzles involve the church (i think roman catcholic, but not sure, at least cristian :)) as well as the tempeliers

there are some things said in the book which are a bit controversial ... but nothing people should get mad about ... well as long as you wont get mad about the sorcery in harry potter :)