The Year of Living Biblically by A J Jacobs
This is subtitled "One Man's Humble Quest to Follow the Bible as Literally as Possible" which sums the premise up really. After reading the Bible (in many forms, a trip to a Bible bookshop brought many new styles of Bible to his attention, including a rap bible and one that looks like a teen magazine) Jacobs makes a note of all the rules he must obey, and does so for a year.
This was in the "humour" section of Borders, so I was expecting something slightly different, but I did like this book a lot. Whilst at times it is very funny, it was also a very personal account of Jacobs' journey. Indeed, AJ feels he is two people at times- secular AJ and religious Jacob. This book also made me think- for example, we are told that telling lies is sinful- yet how hard is it to always tell the truth? There is also the discussion of why these rules exist, and their relevance to modern-day society.