A.J. Jacobs is a journalist, author, and speaker best known for his immersive, often comedic self-experiments. His books explore extreme personal challenges, such as living by biblical rules for a year in The Year of Living Biblically, reading the entire Encyclopedia Britannica in The Know-It-All, and optimizing his health in Drop Dead Healthy. Blending memoir, history, and science with humor, he delves into human behavior and curiosity. A regular contributor to Esquireand The New York Times, Jacobs is also a popular speaker, sharing insights on gratitude, learning, and unconventional personal growth.