The Black Book of Buried Secrets (Hardcover) by Rick Riordan

The 39 Clues: The Black Book of Buried Secrets is a comprehensive guide to uncovering history's most notorious family secrets.

With an introduction by Rick Riordan, this book reveals shocking truths about the Cahill family and their involvement in the Clue hunt.

Inside, you'll find every buried secret, weapon or gadget, stronghold, and agent or founder.

Discover the true story of Madeleine Cahill and what happened after Isabel Kabra was charged with murder.

This book is a must-have for any fan of the New York Times bestselling series, as it provides an in-depth look at the Cahill family's history and their role in the Clue hunt.

Don't miss out on this opportunity to uncover the hidden secrets of one of history's most mysterious families.

Order now!