Montgomery Bonbon Series 3 Books Collection Set By Alasdair Beckett-King (Murder at the Museum, Death at the Lighthouse & Mystery at the Manor):

Murder at the Museum:
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… ut 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.

Death at the Lighthouse:
The most troublesome thing about being a detective is that it is almost impossible to go on holiday. hen 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.

Mystery at the Manor:
Bonnie Montgomery (as her case-cracking alter-ego Montgomery Bonbon) has been invited to Adderstone Manor by Fergus Croke, whose prized diamond has gone missing. Croke is a retired master thief who suspects one of his four protégés of the dirty deed – but when everyone is a crook, how does even the great Bonbon know where to begin?