My mum's from planet Pluto - Gwyneth Rees

Daniel is delighted when his mum gets a big new job as a headteacher - until he discovers that the school is miles away, that he will have to move, and that it will be HIS school that his mum will be leading! But worse is to come, for when Dad has to go to New Zealand to be with his dying mother, Mum stops taking her tablets - the medication that keeps her manic depression under control. Behaving increasingly erratically, not to mention hideously embarrassingly, Mum is heading for a collision course with disaster - and only Daniel can stop her.