Jack Gantos has written books for people of all ages, from picture books and middle-grade fiction to novels for young adults and adults.

His works include Hole in My Life, a memoir that won the Michael L. Printz and Robert F. Sibert Honors; the Joey Pigza series, which include a Newbery Honor book and a National Book Award Finalist; Dead End in Norvelt, winner of the Newbery Medal and the Scott O'Dell Award for Historical Fiction; and the Rotten Ralph series.

Adam Rex is the New York Times best-selling author and illustrator of Frankenstein Makes a Sandwich. His other books include The True Meaning of Smekday, which was made into the hit animated movie Home; Moonday; and School's First Day of School, illustrated by Christian Robinson.

He also illustrated the Brixton Brothers series, Billy Twitters and His Blue Whale Problem, Chloe and the Lion, and How This Book Was Made, all by Mac Barnett, and Chu's Day, by Neil Gaiman. He lives in Tucson, Arizona.