William's parents are divorced, and his mum has a new boyfriend, Mark. William isn't sure about Mark. He sits in dad's chair, and when he moves in, he brings an awful lot of things. Mum and Mark seem very happy, but no one asks if William is happy. Sometimes he likes Mark, and then he feels guilty about his own dad. But dad tells him not to worry - that he will always love him. Bright photographs and simple, large print sentences make this very accessible. There is an index and a page of advice for parents and teachers using the book.