**A.J. Jacobs (@ajJacobs) (ajjacobs.com)** 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 has appeared on *Oprah*, *The Today Show*, *Good Morning America*, CNN, *The Dr. Oz Show*, *Conan,* and *The Colbert Report*. He has given several TED talks, including ones about living biblically, creating a one-world family, and living healthily. For his latest book, *The Puzzler: One Man’s Quest to Solve the Most Baffling Puzzles Ever, From Crosswords to Jigsaws to the Meaning of Life*, A.J. dived into the world of puzzles, including cryptography and codebreaking.