Tracey Corderoy lives near Gloucester in the Cotswolds with her family and a host of lively, lovely pets. Once a trained primary school teacher, Tracey is now an award-winning children’s writer and has published over 45 books since 2010, including the Shifty McGifty and Hubble Bubble series (Nosy Crow).

She loves visiting schools, libraries and bookshops, bringing her stories to life with bright, engaging events, and inspiring children to want to be writers too!

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.