The 39 Clues: The Maze of Bones

In this first book of the 39 Clues series, written by Rick Riordan, orphaned siblings Amy and Dan Cahill learn they belong to the most powerful family in history. When their grandmother dies, she leaves them a choice: a million dollars or the first of thirty-nine clues to the source of the family's power. The children race across the world against dangerous relatives, solving puzzles linked to historical figures such as Benjamin Franklin.

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Shane Parrish: “The kids and I listened to the audio version on our road trip to NYC last weekend. They couldn’t get enough. So much so that I had to have book two waiting for them when we got home.”