Into the Gauntlet (The 39 Clues, Book 10)

In the explosive finale of the #1 bestselling 39 Clues series, fourteen-year-old Amy Cahill and her younger brother, Dan, are determined to complete their quest for the 39 Clues while grappling with the complexities of their fractured family, whose past actions have left them scarred. As they strive to unite their family amidst danger and deception, they discover a crucial secret held by the Madrigals—one that could have dire consequences for them and the world.