You remember A. J. Jacobs. For his first book, he read the Encyclopedia Britannica from A to Zz. For his second book, A Year of Living Biblically, he followed every Gospel commandment and Old Testament rule. In The Guinea Pig Diaries, he goes all the way, committing himself to experiments that would probably curl the hair of Sacha Baron Cohen. In one full-body immersion, he goes undercover as a beautiful woman. In another, he outsources everything in his life, from answering his personal letters and emails to arguing with his wife. Other experiments including public nudity, living like George Washington (but remaining clothed), and speaking with complete frankness for two solid months. An education in itself.