Gretchen Woelfle came across the story of a cat, a baby and a flood when travelling in the Netherlands. About Katje the Windmill Cat, she says, "I began to wonder who was the cat that was so clever and so brave, and Katje's story began to develop." Gretchen Woelfle's stories for children appear frequently in magazines and anthologies. She lives in California, USA. Nicola Bayley is particularly known for her exquisite pictures of cats, although with Katje the Windmill Cat she especially enjoyed creating the world in which Katje lived. One of this country's best-loved artists, Nicola Bayley has illustrated many acclaimed picture books for children, including All For the Newborn Baby, The Necessary Cat and the award-winning The Mousehole Cat. She lives in London.