Tracey Corderoy (Author) Tracey was born and grew up in industrial South Wales and now lives in a hidden valley in Gloucestershire with her husband, two children and an ever-increasing menagerie of devilishly-cute-but-sometimes-rather-naughty pets. A trained teacher, Tracey has always had a passion for wonderful literature and began writing for children in 2006. Her head is happily crammed with countless ideas and stories and she's loving the adventures that her characters insist they share . . . Joe Berger (Illustrator) 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.