Sarah Hayes is the author of many books for children, including the This is the Bear quartet; Mary, Mary (9781844284849) and The Grumpalump (9780744594560). She lives in Oxfordshire. Helen Craig is the joint creator, with Katharine Holabird, of the hugely popular Angelina Ballerina series, now a popular TV series. An acclaimed illustrator, she also wrote and illustrated The Town Mouse and the Country Mouse, which was shortlisted for the 1992 Nestle Smarties Book Prize. Helen lives in Cambridge.