Shannon Hale is the bestselling author of many books for children, including the Ever After High series, Princess Academy (Newbery Honor book), and The Unbeatable Squirrel Girl middle grade novel. She co-wrote the graphic novels Rapunzel's Revenge and Calamity Jack and the chapter book series The Princess in Black with her husband Dean Hale. They live with their four children near Salt Lake City, Utah.

LeUyen Pham has illustrated more than one hundred books for children, including the Caldecott Honor book Bear Came Along by Richard T. Morris and the bestselling Princess in Black series by Shannon and Dean Hale. She is the co-creator, along with Shannon Hale, of the bestselling graphic memoirs Real Friends, Best Friends, and Friends Forever. Her own books include The Bear Who Wasn't There and Big Sister, Little Sister. A graduate of the Art Center College of Design in Pasadena, LeUyen lives in Los Angeles with her husband and two sons.