Mark Sperring studied at Bath Academy of Art and Camberwell College of Art before working as a printer and a bookseller, and later becoming a children's book author.

Mark is the author of The Shape of My Heart (Bloomsbury), Captain Buckleboots on the Naughty Step (Puffin) and The Sunflower Sword (Andersen). He lives in Bristol.

Paul Linnet was born by the sea near to Brighton, but he grew up in Derby, where he studied graphic design and played guitar in a band called The Chihuahuas. Eventually Paul moved back to Brighton where he met Sue Hendra and they instantly fell in love.

Their celebrated picture book partnership has created many bestselling, award-winning books including Barry the Fish with Fingers, Norman the Slug with the Silly Shell, Supertato, and most recently the Laugh Out Loud Book Award–winning I Need a Wee. Sue and Paul live with their daughter Wanda in a house in Brighton where Paul likes to fuss about with an old motorbike and still plays the guitar.