ROS ASQUITH has been a Guardian cartoonist for 20 years, and has written and illustrated over 70 books for young people, including the bestseller The Great Big Book of Families , with Mary Hoffman, the Teenage Worrier series, Letters from an Alien Schoolboy -which was shortlisted for the Roald Dahl Funny Prize- and her debut picture story book It's Not Fairy . Ros lives in north London with her husband and two sons. For more information about Ros, visit her website: www.rosasquith.co.uk