Title: The Black Circle
Author: Patrick Carman
Description: A strange telegram lures fourteen-year-old Amy Cahill and her younger brother, Dan, deep into Russia and away from the only trustworthy adult they know. Signed with the initials NRR, the telegram launches a race to uncover a treasure stolen by the Nazis and the truth behind the murder of the last Russian royal family. All too soon, the treasure hunt starts to smell like a Lucian trap. But the bait might just be irresistible...what will Amy and Dan risk to find out what really happened on the night their parents died?
This 5th book in the 39 Clues series is really good. There is a lot more action in this book then I remember from any of the other books in this series, of course it took my a while to get my hands on the 5th book.
I do think that this is a excellent series for kids to read, there full of adventure and things that most kids will love.