Molly Moon is a master hypnotist, a time-traveller and a mind-reader, and in this story she harnesses a new power - morphing. Soon she and her twin brother Micky are swapping bodies with ladybirds, rats, even the Queen of England herself! But the fun can't last forever ... and unless they can get 'The Advanced Arts' hypnotism book, they will never return to their own bodies. Sabotaged by wicked women who want to destroy them, Molly and Micky must find a way to return to themselves in spite of all the dangerous surprises thrown in their way.