Mac Barnett is the author of several picture books, including President Taft Is Stuck in the Bath, Chloe and the Lion, and Guess Again!, which TIME magazine named the number 2 Picture Book of 2010.
Mac Barnett collaborated with Jon Klassen on Extra Yarn, which won the 2012 Boston Globe–Horn Book Award in the Picture Book category, and on Sam and Dave Dig a Hole.
Mac Barnett also writes the Brixton Brothers series of mysteries. He is the founder of the Echo Park Time Travel Mart, a convenience store for time travelers, and serves on the board of 826LA, a not-for-profit writing and tutoring center in Los Angeles. He lives in California.