The 39 Clues is a very interactive series. You get cards in each book, and can enter them online to try and solve the mystery. At the moment there are ten 39 Clue books. Each book is by a different author. Book 1, Rick Riordan. Book 2, Gordon Korman. Book 3, Peter Lerangis etc.
The Maze of Bones, by Rick Riordan, is about the Cahill family. With Dan and Amy Cahills parents dead from a bad fire, Dan and Amy escape with only their lives. Grace Cahill, one of the oldest Cahills, is now dead. There was a funeral, all of the Cahills were invited and were told something that could change their lives forever. You could either take a big portion of money, or take on a challenge that could bring them extraordinary powers. Dan and Amy Cahill decide on taking the challenge. The two of them meet up with Nellie, their babysitter, and they head off to Paris, France. When in Paris, they have to complete lots of puzzles and challenges to find the maze of bones. The maze of bones has something to do with Ben Franklin&&
I think the author did a great job with starting the first 39 clues in the series. It is not easy because other authors have to make a sequel to the book(s). Rick has good details and explanations to imagine being in the maze of bones. Mr. Riordan could have done better by saying who said what in the dialogue. If you like mysteries, puzzles, and books that make you think a lot, you should read this book. Overall, I give the book 5 stars, maybe 6 (Ages 9+).