Told through school workbooks, secret recordings and more, Janice Hallett's follow-up to A Box Full of Murders finds Ava and Luke investigating a cold case in an old museum. This is the second children’s murder mystery from Janice Hallett.

Imagine an old museum with more secrets than anyone could ever guess. A school trip that ends in murder. A crime unsolved for decades. . . But who did it?

Now, Ava and Luke are on the case, following the clues left in a new box of murders. Using school workbooks, museum records, secret recordings and letters the siblings start to unravel the mystery of a body in the basement. But can they discover what really happened . . . before the killer strikes again?

YOU know the facts. YOU have all the clues. Can YOU solve the mystery before they do?