The Guinea Pig Diaries: My Life as an Experiment by A. J. Jacobs
About: Jacobs embarks on a series of temporarily life-altering "experiments." He outsources his life to India, woos online daters for his nanny, becomes Radically Honest, pretends to be an actor from Shine, tries to be totally rational, poses nude, behaves like George Washington, tries to do only one task at a time, and do everything his wife says.
Pros: Funny book, amusing experiments
Cons: Notes in back not mentioned in the text of the book, so I didn't know they were there to refer to, no in-text cites.