Charlie and Julia are certain that the sleepy village of Peddle-Worth must contain some mysteries for their brand new agency - The Milkshake Detectives - to solve. All they need to do is find them!

So when somebody called 'The Bear' starts leaving strange clues, they can't wait to put their spy skills to use. The only problem? Everyone else wants to join in the bear hunt too! Not least, Charlie's new step-brothers who are quite possibly the most irritating boys on the planet.

But with the competition heating up, Charlie might be missing a more important mystery. And this one lies a lot closer to home . . .

Heather Butler's first novel, Us Minus Mum, has been longlisted for the Carnegie Medal 2015 and shortlisted for the UKLA Book Awards.

There are 208 pages in this book. This book was published 2015 by Hachette Children's Group .

Heather Butler grew up in a vicarage, which meant her life was filled with a tapestry of random and interesting characters. But what influenced her most was her mum, who could create stories from thin air.