Bill Doyle is the author of Attack of the Shark-Headed Zombie and Behind Enemy Lines, as well as many other books for kids-with over two million copies in print. He has also created lots of games for Sesame Workshop, Warner Bros., and Nerf. He says, "My happiest moment as an author was when the genius Master Escapologist sent me a secret message offering me the job to write his incredible books." (No, he's not just saying that because the Master Escapologist is writing this biography!) Bill lives in New York City.

Yancey Labat is the bestselling illustrator of the original DC Super Hero Girls graphic novel series. He got his start at Marvel Comics before moving on to illustrate children's books from Hello Kitty to Peanuts for Scholastic, as well as books for Chronicle Books, ABC Mouse, and others. His book, How Many Jelly Beans?, with writer Andrea Menotti, won the 2013 Cook Prize for best STEM (Science, Technology, Education, Math) picture book from Bank Street College of Education.