Susan Patron specialized in Children's Services for 35 years at the Los Angeles Public Library before retiring in 2007, the same year her novel The Higher Power of Lucky was awarded the John Newbery Medal. As the library's Juvenile Materials Collection Development Manager, she trained and mentored children's librarians in 72 branches. Patron has served on many book award committees, including the Caldecott and Laura Ingalls Wilder Committees of the American Library Association. She is currently a member of the Advisory Board of the Society of Children's Book Writers and Illustrators.

Patron's previous books for children include the Billy Que trilogy of picture books; Dark Cloud Strong Breeze; and a chapter book, Maybe Yes, Maybe No, Maybe Maybe. All earned starred reviews, and the latter was named an ALA Notable book. The Higher Power of Luck will be translated into twelve foreign languages and has been optioned for a motion picture. Married to a rare book restorer from the Champagne region of France, Susan is working on the final book in the "Lucky" trilogy.

Matt Phelan's black-and-white illustrations first appeared in The Seven Wonders of Sassafras Springs by Betty G. Birney. His picture books include The New Girl...and Me and Two of a Kind, both written by Jacqui Robbins. Matt lives in Philadelphia, Pennsylvania.