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. Visit her at DoreenCronin.com.

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.