Mac Barnett is the author of many beloved picture books for children, including Just Because, illustrated by Isabelle Arsenault; A Polar Bear in the Snow, illustrated by Shawn Harris; and John's Turn, illustrated by Kate. He is also the author of several books illustrated by Jon Klassen, including Sam and Dave Dig a Hole, a Caldecott Honor Book and E. B. White Read-Aloud Award winner; the shape trilogy; and The Wolf, the Duck, and the Mouse, an E. B. White Read-Aloud Award winner. Mac Barnett lives in California.

Isabelle Arsenault is the creator of Alpha and the illustrator of several other picture books, including Jane, the Fox, and Me by Fanny Britt, a New York Times Book Review Best Illustrated Children's Book of the Year; Captain Rosalie by Timothée de Fombelle; and Cloth Lullaby: The Woven Life of Louise Bourgeois by Amy Novesky. Isabelle Arsenault lives in Montreal.