Ever wished you could swap your mum? Be careful what you wish for...Mum Trouble! Oli wants to swap his mum for someone who'll let him eat loads of pepperoni pizza and watch Real Blood Bath Murders on telly. Mother 44 drives a tank and trains secret agents. But she's also hatching an evil anti-children plot - and she's looking for a boy to help. When the Mum Shop's Matcher puts them together, it's trouble!