The Year of Living Biblically, by A.J. Jacobs

A. J. Jacobs spent a year trying to live obeying the 720 rules he found when reading about 10 different versions of the bible. From the 10 commandments to the wildly obscure, his quest to find out how relevant ancient moral and ritual law is in the 21st century is definitely entertaining, and surprisingly thought provoking. He is, of course, a trivia fountain, but about halfway through the book, he seems to take what started as a jokey experiment much more seriously, and really tries to find out what his own faith means. Good, fun read.