Flora and Sylvie are going on the holiday of a lifetime with their dad. But – WHAT? – Dad cancels the trip only hours before the flight because – OH MY GOODNESS – someone has stolen precious blueprints of Dad's latest invention: an amazing new scooter. But who? And why? Time to call on the only five people who can possibly solve the crime!

The third in a fantastic new series filled with friendship, adventure and mystery!

Elen Caldecott graduated with an MA in Writing for Young People from Bath Spa University and is now the author of six children's novels. Before becoming a writer, she was an archaeologist, a nurse, a theatre usher and a museum security guard. Her debut novel, How Kirsty Jenkins Stole the Elephant, was shortlisted for the Waterstones Children's Book Prize and longlisted for the Carnegie Medal. Elen lives in Bristol with her husband and their dog.