On their own, pranksters Miles and Niles were pretty devious. Now that they've formed a pranking duo, they're terrible! But their powers will be tested when their favorite nemesis, Principal Barkin, is replaced by his stern and cunning father, Former Principal Barkin. Now Miles and Niles will do just about anything to get their old antagonist back-including pranking alongside him. Authors and friends Mac Barnett and Jory John "are in perfect comic harmony" (Publishers Weekly) in this series that celebrates inventiveness, friendship, and the power of teamwork-for good, or for terrible.|Mac Barnett is the coauthor of the Terrible Two series and the author of many picture books, which have won multiple Caldecott Honors. Claire Keane studied graphic design in Paris before moving to Los Angeles, where she worked at Walt Disney Feature Animation for 10 years and contributed to Frozen, Tangled, Enchanted, and many other films. She now lives in Venice Beach, California, where she writes and illustrates children's books.; Jory John is a New York Times bestselling author of books for both children and adults. He is a two-time E.B. White Read-Aloud Honor recipient. Jory's work includes the picture books Giraffe Problems and Penguin Problems, both illustrated by Lane Smith, the Goodnight Already! series, illustrated by Benji Davies, The Bad Seed and The Good Egg, both illustrated by Pete Oswald, and the award-winning Quit Calling Me a Monster!, illustrated by Bob Shea. He also co-authored numerous humor books, including the internationally bestselling All My Friends Are Dead. Jory spent six years as programs director at 826 Valencia, a nonprofit educational center in San Francisco. He resides in Oregon.; Kevin Cornell is the illustrator of many children's books. He lives in Philadelphia.