Mac Barnett is an American writer of children's books living in Oakland, California. Barnett graduated from Pomona College, where he studied under the writer David Foster Wallace. Extra Yarn, a picture book illustrated by Jon Klassen, won the 2012 Boston Globe–Horn Book Award and 2013 E.B. White Read Aloud Award. It was a Caldecott Medal Honor Book. Sam & Dave Dig a Hole, illustrated by Jon Klassen, won a Caldecott Honor and the 2015 E.B. White Read Aloud Award. Works Novels Brixton Brothers mystery novels published by Simon & Schuster (S&S): The Case of the Case Mistaken Identity, illustrated by Adam Rex (Oct 6, 2009) The Ghostwriter Secret, illus. Adam Rex (Oct 5, 2010) It Happened on a Train, illus. Adam Rex (Oct 4, 2011) Danger Goes Berserk, illus. Matthew Myers (Oct 2, 2013) The Terrible Two - By Mac Barnett and Jory John, with illustrations by Kevin Cornell (Amulet Books) The Terrible Two (January 2015) The Terrible Two Get Worse (January 2016) The Terrible Two Go Wild (January 2018) The Terrible Two's Last Laugh (January 2019) Mac Barnett Kid Spy - By Mac Barnett , with illustrations by Mike Lowery Mac B., Kid Spy: Mac Undercover (September 2018) Mac B., Kid Spy: The Impossible Crime (December 2018) Mac B., Kid Spy: The Top-Secret Smackdown (March 2019) Mac B., Kid Spy: Mac Cracks the Code (December 2019) Mac B., Kid Spy: The Sound of Danger (September 2020) Mac B., Kid Spy: Mac Saves the World (May 2021) Picture books Billy Twitters and His Blue Whale Problem, illustrated by Adam Rex (Hyperion Books, June 23, 2009) Guess Again!, illustrated by Adam Rex (Simon & Schuster, September 15, 2009) The Clock without a Face: a Gus Twintig mystery (McSweeney's, April 27, 2010) – "by Scott Teplin, Mac Barnett & Eli Horowitz; plus faces by Adam Rex & numbers by Anna Sheffield" , board book Oh No! (Or How My Science Project Destroyed the World), illustrated by Dan Santat (Hyperion, June 1, 2010) Mustache!, illustrated by Kevin Cornell (Hyperion, October 25, 2011) Extra Yarn, illustrated by Jon Klassen (Balzer + Bray, January 17, 2012) Chloe and the Lion, illustrated by Adam Rex (Hyperion, April 3, 2012) Oh No, Not Again! (Or How I Built a Time Machine to Save History) (Or at Least My History Grade), illustrated by Dan Santat (Hyperion, June 5, 2012) Count the Monkeys, illustrated by Kevin Cornell, (Hyperion, June