The Maze of Bones is the first book in The 39 Clues series, it was written by Rick Riordan.

In the MOB, you are introduced to the Cahill family including Amy and Dan Cahill's history.
The Maze of Bones

In the beginning of the book, Grace Cahill is on her death bed, and she gives Cahills the chance to enter into a race to see who can find the 39 clues first in order to make a serum that whoever drinks it, will make them the most powerful person in the world. The Cahills who take the challenge are; the Holts, Irina Spasky, the Kabras, Jonah Wizard, and the Starlings all accept the challenge.

Throughout the book, Amy and Dan learn that many many famous people in history were a part of the Cahill family, like; Benjamin Franklin, Mozart, Napoleon Bonaparte, and Marie Curie. In the race to find the first clue the hunt leads Amy and Dan to the catacombs in Paris. You will be thrilled, scared, and hanging off the edge of your seat as you join the Cahills in the mad dash race to become the most powerful person in the world........

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