Title: The Maze of Bones
Description: Minutes before she died Grace Cahill changed her will, leaving her decendants an impossible decision: You have a choice - one million dollars or a clue.

Grace is the last matriarch of the Cahills, the world's most powerful family. Everyone from Napoleon to Houdini is related to the Cahills, yet the source of the family power is lost. 39 clues hidden around the world will reveal the family's secret, but no one has been able to assemble them. Now the clues race is on, and young Amy and Dan must decide what's important: hunting clues or uncovering what REALLY happened to their parents.
Subjects: Scavenger hunts, Families, Wills, Fiction, Mystery fiction, Adventure fiction, Cities, Orphans, Juvenile fiction, History, Children's fiction, Family, fiction, Mystery and detective stories, Adventure and adventurers, fiction, nyt:series_books=2010-05-01, New York Times bestseller, Treasure hunt (Game), Brothers and sisters, Inheritance and succession, Adventure and adventurers, Family secrets, nyt:chapter-books=2008-09-28, New York Times reviewed, Genealogy, JUVENILE FICTION / Family / Siblings, JUVENILE FICTION / Historical / Europe, Code and cipher stories, Adventure stories, Family, Cryptography, JUVENILE FICTION / Action & Adventure, Ficción juvenil, Vida familiar, Secretas de la familia, Hermanos, Historia, Derecho sucesorio, Cazas al tesoro, Familia, Huérfanos, Clues