The Treasure Key: (The Crime-Solving Cousins Mysteries Book 2)

A perfectly gift-wrapped package appears on Sophie's doorstep. No name. No return address. Inside: an old envelope. Inside that: a key.

But a key to what?

What starts as a curious puzzle quickly turns into their biggest mystery yet. Following the clues from small-town Pine Hill to a mysterious mansion, twelve-year-old cousins Sophie and Jessica find themselves chasing a secret someone else will do anything to protect - and a treasure that's been hidden for a very long time.

With their friend T...