Michael Rosen is one of the most popular authors for children. His bestselling titles published by Walker Books include We're Going on a Bear Hunt, A Great Big Cuddle, Little Rabbit Foo Foo, Michael Rosen’s Sad Book, Tiny Little Fly and What Is Poetry?.

Michael received the Eleanor Farjeon Award for distinguished services to children’s literature in 1997, and was the Children’s Laureate from 2007 to 2009. He is a distinguished critic and academic, Professor of Children's Literature at Goldsmiths, University of London.

He also presents radio programmes for the BBC, and is a political commentator. Michael lives in London.

Chris Mould was born in Bradford, England, and has lived and worked there all his life. He began drawing at a very early age and hasn't stopped since. He trained in art college for six years altogether starting in Dewsbury College and moving to Leeds, during which time he gained a joint honours degree in graphic design and illustration.