Lu Fraser is a hugely exciting voice in children's picture books. She is based in Hampshire, where she lives with her husband and daughter, and writes in a shed in the garden. The Littlest Yak, illustrated by Kate Hindley, was her first book for children and went on to secure multiple foreign editions and to win the Oscar's Book Prize and the Sainsbury's Children's Book Award. It was followed by two further adventures for Gertie: The Littlest Yak: The New Arrival and The Littlest Yak: Home is Where the Herd Is. Lu is also the author of One Camel Called Doug, Mavis the Bravest and Basil Dreams Big, all illustrated by Sarah Warburton.

Sarah Warburton is an established artist whose books include Dinosaurs in the Supermarket (written by Timothy Knapman), The Princess and the Peas (written by Caryl Hart), and the Twinkle books (written by Katharine Holabird), as well as One Camel Called Doug, with author Lu Fraser. She has an uncanny ability to capture huge amounts of charm, humor, and detail in her work. She lives in Bristol, England.