A.J. Jacobs is an author, journalist, lecturer and human guinea pig. He has written four New York Times bestsellers that combine memoir, science, humor and a dash of self-help. He is also editor at large at Esquire magazine, a commentator on NPR and a columnist for Mental Floss magazine. He is currently helping to build a family tree of the entire world and holding the biggest family reunion ever in 2015.In addition to his books, Jacobs written for The New York Times, Entertainment Weekly, and the New York magazine. He has appeared multiple time on Ted, Oprah, The Today Show, Good Morning America, CNN, The Dr. Oz Show, Conan and The Colbert Report.

He is the editor at large for Esquire and has worked for the Antioch Daily Ledger and Entertainment Weekly. He is the author of seven books, including the best sellers: "The Year of Living Biblically" and "The Guinea Pig Diaries".