The Tough Princess, by Martin waddel and partric Benson

This is the tale of a fallen royal family (always a good start!) who live in a caravan and hope to have a boy to save them...they get a girl. its a book to counter gender stereotypes as she goes off on her bike to search for her prince. quite a lot of 'biffing' later, she finds him..
Fun, lively, even my two year old likes it.