Doreen Cronin is the author of many bestselling and New York Times bestselling picture books, including Click, Clack, Quack to School!; Click, Clack, Surprise!; Click, Clack, Ho, Ho, Ho; Click, Clack, Peep; Click, Clack, Boo!; Dooby Dooby Moo; Thump, Quack, Moo: A Whacky Adventure; Bounce; Wiggle; Duck for President; Giggle, Giggle, Quack; Bloom; and the Caldecott Honor Book Click, Clack, Moo: Cows That Type as well as The Chicken Squad series and Cyclone. She lives in Brooklyn, New York.

Stephen Gilpin is the illustrator of several dozen children's books and is currently working on a project he hopes will give him the ability to walk through walls - although he acknowledges there is still a lot of work to be done on this project. He currently lives in Hiawatha, Kansas, with his genius wife, Angie, and their kids.