The second instalment in a brilliantly clever, funny and highly illustrated murder mystery series The most troublesome thing about being a detective is that it is almost impossible to go on holiday. When Bonnie Montgomery finally gets a break from cracking cases as her alter-ego, Montgomery Bonbon, something terribly fishy happens the moment she and Grampa Banks arrive on Odde Island for half-term – and it's not just the smell of the harbour. There's been a mysterious death at Leerie Lighthouse, and what everyone assumed was an accident is setting Bonbon's moustache all a-quiver: a sure sign that something is Highly Suspicious. When a second death takes place on the other side of the island, Bonnie is sure the two are connected. But can she solve this case alone, or will she need double the detectives to solve double the murder?

A brilliantly funny young murder mystery from a rising stand-up comedian, podcaster and filmmaker - and exciting new talent in children's fiction. Many people go their whole lives without noticing anything that is afoot, amiss, or even untoward; without ever experiencing that toe-tingling, stomach-twisting sensation that a mystery is about to unfold. Not Bonnie Montgomery - the world's best detective. Not that anyone (other than Grampa Banks) has heard of her... But they might have heard of the great Montgomery Bonbon, the well-dressed gentleman detective who (apart from the hat and moustache) looks suspiciously like a 10-year-old girl. Their newest case: solving the mystery surrounding a highly suspicious death at the Hornville Museum. Together they'll interview some dodgy witnesses, scour the scene for clues and - above all - hope no one notices that Bonnie and Montgomery are never in the same room at the same time...