Elizabeth Spires is the author of three other books for children, including The Mouse of Amherst, and four collections of poetry for adults. Her book I Heard God Talking to Me was published by FSG in Spring 2009. She lives in Baltimore, Maryland. Mordicai Gerstein is the author and illustrator of The Man Who Walked Between the Towers, winner of the Caldecott Medal, and has had four books named New York Times Best Illustrated Books of the Year. He lived in Westhampton, Massachusetts.