I love love this series. Apparently this is another side series to the series (yes I know that sounded crazy!) Here is the goodreads description:
So I finished this book today as a part of my read-a-thon this week. Turned out to be quite a short book.
Notice above in the goodreads description it says this is a stand alone novel. I disagree. I feel like you might get what's going on, but you really should'nt read this unless you have actually read the 39 Clues series. I didn't even know this book existed until I was looking through the new orders from my library and saw it. Then I found out that there are four "Cahill File" books and they are all already out so I am behind. For those of you who don't know this is a book series where each book is written by a different author. I love that concept which is why I picked up these books to begin with. I think there are 3 books published a year which is neat because it keeps you involved in the mystery and adventures and you really don't forget much in between each book.
This book is short though maybe like 130 pages... wish it was a little longer!!!