Joe Berger, the illustrator of Hubble Bubble, Granny Trouble and Superhero Dad, is a children's author, illustrator and cartoonist who also makes the occasional award-winning animated short film and title-sequence.

He is co-creator of the Berger & Wyse food cartoon in the Guardian magazine each Saturday, and has illustrated numerous books, inside and out, for children and grown-ups. Joe lives in Bristol with his wife, three daughters, two cats and a small dog.