Like always, the author has created a story full of mystery, suspense and history. In this book we have are usual cast of characters. Nathan, the young teen turned detective. He was left a unique bookcase by his father. That bookcase has helped him solve several mysteries, helped him find several treasures and almost gotten him killed more times than he could count. His best friend Gina is always in on the capers. After one too many close calls her parents have forbid her to see Nathan at all. It doesn't matter they live right down the street from each other. In this story we are taken on a journey that is very personal to Nathan. He learns that his grandfather was murdered. He also learns about a group his grandfather had created to help those in need. He called them the facilitators. This time he has been assigned someone to protect him. He teaches him defensive moves, how to move quickly and plan for any contingency. He helps him with strength training. However, none of that will stop someone from using him to try to get what they want, no matter what the consequences are to him. I read the book in two days. I didn't want to stop, but had to find time to sleep. This is by far one of the best of his books in this series. I really enjoy the amount of historical information he gives at the end of the book. I think the historical research he does to make sure there is accuracy in his books is one of the major delights for me. Each book shows the main character growing and maturing in natural ways. The progression along with the pacing of the book makes the reader not want to put the book down. He always ties it up neatly, yet at the same time he leaves something or someone in the book that we were introduced to unfinished. It always leaves you wondering, "But what about....?" Then he finishes off the book with a taste of the next book in the series. This is and always had been one of my favorite series. It all began with the very first book, "The Case of Secrets." If you have not read any of this series you need to get out there and do so. Now to pass this one on to my grandson who loves this series.