I thought that The Maze of Bones by Rick Riordan was a good first book to the 39 Clues series. I liked the way that the two kids, Amy and Dan, don't know they are a part of the world's most influential family until Grace's funeral. This kind of inspires the thought that really anyone could be a part of something powerful and not know it. I really liked this book. I thought that along with it being well-written, the characters were well-described. However, I thought the way the characters were literally always joking was a little hard to believe. I would recommend this book to my friends.
Tompkins County Public Library