They must unlock the mystery-before time runs out. Unwrapping a puzzling package and finding a clue launches twelve-year-old cousins Sophie and Jessica into the dangerous mystery of The Treasure Key. They're soon racing against time-a...

Will they find the spy--or will the spy find them first?When twelve-year-old cousins Sophie and Jessica take a class at a chocolate factory, they don't expect to see bad guys in such a sweet place. Strange happenings make them wonder ...

They start chasing a mystery—then it chases them. Twelve-year-old cousins Sophie and Jessica don’t have much in common. Sophie loves hiking and her small town. Jessica would rather be shopping in a city. The only mystery is how t...