Im not sure, but i think it's because every time they found a clue, they would find bones.
It was a puzzle with coordinates leading to the second clue.
Buy your own book!
The Maze of Bones by Rick Riordan has 220 pages.
The Maze of Bones was written by Rick Riordan under the pseudonym of Jude Watson for the popular children's book series, The 39 Clues.
Maze of Bones is written by Rick Riordan. It is the first book in the 39 clue series. It has 220 pages.
book 1 maze of bones
Yes, I can solve the mouse maze puzzle
Rick Riordan
In the book they are independent and alone except for Nellie
At the beginning of the book they are in Massachusetts.
The Maze of Bones was created on 2008-09-09.
there is no second clue in book 1. It's the first book but the clue is iron solute