Michael Rosen is a poet and the author of many books for children, including We're Going on a Bear Hunt, illustrated by Helen Oxenbury, which won the Nestlé Smarties Children's Book Prize; A Great Big Cuddle, illustrated by Chris Riddell; and Michael Rosen's Sad Book, illustrated by Quentin Blake. He received the Eleanor Farjeon Award for services to children's literature in 1997 and served as Children's Laureate in the UK between 2007 and 2009. Michael Rosen lives in London.

Robert Starling is a creator of many books for children, including Fergal Is Fuming!, which was short-listed for the Waterstones Children's Book Prize, and other books in the Fergal series. He is also the illustrator of I Am Happy and I Am Hungry, both by Michael Rosen. Robert Starling lives in England.