Katherine Applegate is the author of The One and Only Ivan, winner of the 2013 Newbery Medal. Her novel Crenshaw spent over twenty weeks on the New York Times children's bestseller list, and her first middle grade standalone novel, the award-winning Home of the Brave, continues to be included on state reading lists, summer reading lists, and class reading lists.

She lives with her husband, the author Michael Grant, who she co-wrote the Animorphs series with, and their two children in Northern California.

Charlie Alder has illustrated many books for children, including Toot! and Express Yourself! Daredevil Duck is her first authored and illustrated picture book.

She lives in Devon, England, with her husband and son, whose exploits on a squeaky red tricycle inspired the creation of her feathered hero.

When not drawing ducks, Charlie can be found in her studio drinking coffee, arranging her crayons, and inventing more accidental superheroes.