BOYS v GIRLS — Anne Digby

When a bike is stolen from the school bike sheds at Jug Valley Juniors, Tim forms a secret club with his friends Ben and Ludo to try to solve the crime. They call themselves the Handles. 'This isn't girls' stuff,' he tells his twin sister Amy. 'It needs boys to handle it.'
To get back at the boys, Amy and her best friend Mini jokingly call themselves the Spouts...but it's no longer a joke when Mum's lovely bike is stolen, too, giving the girls a serious quest of their own. And so the rival detectives go into action - mainly against each other.
Yet they should be working together if they want to avoid danger....