MARY POPE OSBORNE is the author of the New York Times number one bestselling Magic Tree House® series as well as coauthor of the Magic Tree House Fact Tracker series, along with her husband, Will, and her sister, Natalie Pope Boyce.

SAL MURDOCCA has illustrated more than 200 children's trade books and textbooks. He is also a librettist for children's opera, a video artist, an avid runner, a hiker, a bicyclist, and a teacher of children's illustration at the Parsons School of Design. Sal lives and works in New York with his wife, Nancy.