Kathryn Lasky is the Newbery Honor-winning author of over 100 books for children and young adults. Her beloved Guardians of Ga'Hoole fantasy series has more than seven million copies in print, and she is the author of the Daughters of the Sea series and the Wolves of the Beyond series, as well as A Time for Courage and other Dear America titles.

Kathryn has also written a number of critically acclaimed historical fiction titles, such as Beyond the Burning Time and True North. She lives with her husband in Cambridge, Massachusetts.

Mary Pope Osborne is the author of the New York Times number one bestselling Magic Tree House series as well as co-author of the Magic Tree House Fact Tracker series, along with her husband, Will, and her sister, Natalie Pope Boyce.