Meet Piotr, Minnie, Andrew, Flora and Sylvia – true friends and even better mystery-solvers! Hollywood sensation, Betty Massino, has come to star in the theatre down the road and Piotr and his friends Andrew and Minnie couldn't be more excited! But when the famous actress' hugely expensive diamond necklace goes missing, Piotr's dad, a security guard at the theatre, is a prime suspect. Soon, Piotr faces the very real threat of being sent 'home' to Poland. With the help of Sylvie and her twin sister Flora, can Piotr, Andrew and Minnie solve the crime or will they lose Piotr forever? The first in a fantastic new series filled with friendship, adventure and mystery! Perfect for fans of Lauren St John, this is THE new mystery adventure series by Waterstones Book Prize shortlisted author Elen Caldecott.

Lost luggage sparks a new case for the Marsh Road Investigators! When Minnie’s gran comes all the way from Nigeria to visit, Minnie is very excited. But – CATASTOPHE! – Gran’s picked up the wrong suitcase at the airport and this one is full of boy’s clothes. And then their house is burgled – OH NO – and the only thing taken is the case. Minnie realises there’s a mystery to be solved. It’s time to get the gang together! The second in a fantastic new series filled with friendship, adventure and mystery!

Meet Piotr, Minnie, Andrew, Flora and Sylvie – true friends and even better mystery-solvers! 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! Perfect for fans of the Laura Marlin Mysteries by Lauren St John, this is THE new mystery adventure series by Waterstones Book Prize shortlisted author Elen Caldecott.

The fourth title in the brilliant mystery adventure series by Waterstones Book Prize shortlisted author, Elen Caldecott. For fans of the Laura Marlin Mysteries by Lauren St John. Meet Piotr, Minnie, Andrew, Flora and Sylvie – the Marsh Road Mystery solvers. It's a good day for Andrew. His mum is feeling better than she has done in ages and she's even going back to work at last. But things begin to go badly wrong when she signs for a mysterious package containing an ancient Egyptian mummified cat. Has the fated feline cursed the Marsh Road junk shop – or is there something else afoot? The five friends have a new case to solve.