The first children's murder mystery from number-one-bestselling author of The Appeal, Janice Hallett, perfect for fans of Robin Stevens and Rhian Tracey. When Ava and Luke discover a mysterious box of papers in their attic they are instantly curious about secrets it might hold. As they read through letters, diary entries, newspaper cuttings and listen to secret recordings, they realize that a decades-old, still unsolved, murder mystery is unfolding right in front of them .

. . Ava and Luke decide to try and crack the case themselves.

But as they work...