Garth Jennings was one half of the Grammy-nominated production company Hammer and Tongs, who produced TV adverts and music videos for the likes of Blur, REM and Radiohead. In addition, he directed the 2005 film version of The Hitchhiker's Guide to the Galaxy and wrote and directed the 2007 film, Son of Rambow. Now the father of four young boys, Garth is turning his talents towards a younger audience and as well as writing for children is also writing and directing brilliant new films for families. Garth lives in North London with his wife and their children, and The Naughty Step will be his first picture book. Rafael Martin is a Spanish illustrator and animator who now lives in London. Having worked at a theatre company whose aim was to encourage children to read, he went on to study Fine Art and focused on illustrating for children. Rafael used to work at Zinkia Entertainment and was Animation Director on the children's TV series Pokoyo, which airs on CITV in the UK and is narrated by Stephen Fry. Rafael can currently be found beavering away at an animation and motion graphics studio in central London.