Sarah Weeks has written many books for children, including If I Were a Lion, Paper Parade, Angel Face, So B. It, and Two eggs, please. She lives in New York City. When Sarah can't get to sleep, she goes through the alphabet in her head, trying to think of people she knew in elementary school whose names begin with each letter.

Betsy Lewin is the Caldecott Honor–winning illustrator of Click, Clack, Moo: Cows That Type and its sequels, including Click, Clack, Quack to School!; Click, Clack, Ho, Ho, Ho; Click, Clack, Peep; Click, Clack, Boo!; Giggle, Giggle, Quack; Duck for President; Dooby Dooby Moo; and Thump, Quack, Moo; in addition to a number of other picture books, including So, What’s It Like to Be a Cat? and Where Is Tippy Toes?. She lives in Brooklyn, New York.