Ava is sick and tired of her parents always telling her what to do. Nag nag nag. Why can't she have the kind of parents that let her eat sweets all day? Or parents who never make her go to bed, or eat vegetables? Then she sees an advert for the Parent Swap Shop, and Ava knows it's time to trade in the old ones for a new and improved Mum and Dad.

Francesca Simon spent her childhood on the beach in California, and then went to Yale and Oxford Universities to study medieval history and literature. She now lives in London with her family. She has written over 45 books and won THE CHILDREN'S BOOK OF THE YEAR in 2008 at the Galaxy British Book Awards for HORRID HENRY AND THE ABOMINABLE SNOWMAN. Pete Williamson is an artist, illustrator and animation designer. Pete Williamson is an artist, illustrator and animation designer. His highly-acclaimed work includes the award-winning DINKIN DINGS AND THE FRIGHTENING THINGS and the wonderful gothic pottiness of Marcus Sedgwick's THE RAVEN MYSTERIES.