Dean Hale is the New York Times bestselling coauthor of over twenty books for young readers, including Eisner Award-nominee Rapunzel's Revenge, popular early chapter book series the Princess in Black, two novels about the Unbeatable Squirrel Girl, and three graphic novels about Iron Man. It has been said that if you look in the mirror and say Hale's name three times, he will appear and give you a piggyback ride. This is mostly untrue.

Douglas Holgateis a comic book artist and cartoonist with over 25 years of experience. He has produced work for most major book publishers, most notably illustrating the New York Times bestselling series The Last Kids On Earth (Penguin Kids), the graphic novel adaptation of Escape from Mr. Lemoncello's Library (Penguin Kids), and the Big Trouble series (Hardie Grant). He lives in Central Victoria, Australia.