A member of the Association of Illustrators and House of Illustration, Kasia Dudziuk has worked on a prestigious list of internationally acclaimed children's brands, such as Barbie, Thomas the Tank Engine, Mr Men and Little Miss and Winnie-the-Pooh. Her clients include Egmont, Usborne, Marks & Spencer and Sainsbury's. She lives in London. Jo Moon has been a children's book illustrator for 14 years and has worked for a variety of well-known companies in that time, including Ladybird, Dorling Kindersley and Lego. She is based in Liverpool, in the U.K.