WENDY MASS is the New York Times bestselling author of fourteen novels for young people (which have been translated into fourteen languages and nominated for sixty-eight state book awards), including A Mango-Shaped Space (which was awarded the Schneider Family Book Award by the American Library Association), the Twice Upon a Time fairy-tale series, 11 Birthdays, The Candymakers, and 13 Gifts. Her latest books are Space Taxi: Archie Takes Flight and Pi in the Sky. Wendy tells people her hobbies are hiking and photography, but really they’re collecting candy bar wrappers and searching for buried treasure with her metal detector. She lives with her family in New Jersey. Visit her at wendymass.com.