Margaret Mahy's many books - picture books, short stories, and fiction for teenagers as well as younger children - have been hugely successful all round the world and she was indisputably one of the most popular and successful 20th-century children's authors. She won the CARNEGIE MEDAL and many other awards, and was nominated for the HANS CHRISTIAN ANDERSEN AWARD. Margaret died in July 2012. Jenny Williams is a well known children's illustrator. She lives in Wales.