Who is the Outcast and why is he threatening the lives of innocent people? Book 3 reveals a shocking secret that will send Amy and Dan -- and the world -- reeling.
Amy and Dan are shocked to learn that Outcast, a violent renegade who is threatening the lives of innocent people, may be a Cahill family member who is determined to exact revenge. Simultaneous.
Never turn your back on the Cahills . . . The most powerful family history has ever known returns with a vengeance in The 39 Clues: Doublecross!The Cahills are the world's most powerful family, but th
Never turn your back on the Cahills . . . The most powerful family history has ever known returns with a vengeance in The 39 Clues: Doublecross!The Cahills are the world's most powerful family, but th
Amy and Dan are shocked to learn that Outcast, a violent renegade who is threatening the lives of innocent people, may be a Cahill family member who is determined to exact revenge. Simultaneous.
Never turn your back on the Cahills . . . The most powerful family history has ever known returns with a vengeance in The 39 Clues: Doublecross!The Cahills are the world's most powerful family, but th
