Timothy Knapman is the author of many picture books, including Superhero Dad, illustrated by Joe Berger; The Winter Fox, illustrated by Rebecca Harry; and Soon, illustrated by Patrick Benson. He writes both fiction and nonfiction, and his books have been translated into fifteen languages. Timothy Knapman lives in England.

Joe Berger, the illustrator of Superhero Dad and Hubble Bubble, Granny Trouble, writes and illustrates books for children and adults. He is also a cartoonist who makes the occasional award-winning animated short film or title sequence. He lives in England with his wife, three daughters, two cats, and a small dog.