MARY POPE OSBORNE is the author of the New York Times #1 bestselling Magic Tree House series, as well as coauthor of the Magic Tree House Fact Tracker series with her husband, Will, and her sister, Natalie Pope Boyce.For more information, visit the Magic Tree House website at MagicTreeHouse.com! AG FORD is a New York Times bestselling children’s book illustrator and recipient of two NAACP Image Awards. He grew up in Dallas with his mom, his dad, two sisters, and one brother. He majored in illustration at the Columbus College of Art and Design. He lives with his family in Frisco, Texas. Visit him online at agfordillustration.com.