A.J. Jacobs spent a year reading the entire Encyclopedia Britannica and another year following every rule prescribed by the Bible, turning these experiences into the New York Times bestsellers The Know-It-All and The Year of Living Biblically. In The Guinea Pig Diaries, Jacobs presents another year full of experiments as he immerses himself in month-long exercises in self-illumination: assuming the identity of a beautiful young woman, living a life of total honesty, outsourcing his life, and more.