Tony Johnston is the award-winning author of more than one hundred children’s books, including Cat, What Is That?, illustrated by Wendell Minor; First Grade, Here I Come!, illustrated by David Walker; and A Small Thing . . . but Big, illustrated by Hadley Hooper. She lives in California.

Hadley Hooper is an illustrator and painter. Her 2014 book, The Iridescence of Birds: A Book About Henri Matisse by Patricia MacLachlan, was named a Kirkus Reviews Best Children's Book. She lives in Denver with her partner, Hugh, and dog, Maddie.