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The Black Circle

The highly anticipated Book Five of the #1 bestselling The 39 Clues series.

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 about 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?

Important places

St. Petersburg (363)
Volgograd (5)


Moskva (412)
Volgograd (5)
City of St. Petersburg (408)


Russian Federation (1,681)