The fifth book in the bestselling 39 Clues series locates Dan and Amy, finally They are safe, but poised for another dangerous mission involving Lucian secrets and the Madrigals. Taking place in Russia, and running from the dastardly Irina Spasky, the sibling duo might just have the clue hunt of their lives Patrick Carmen is the author of the bestselling Land of Elyon series.
- Genre: Juvenile Fiction
- Subgenre: General, Mysteries + Detective Stories, Action + Adventure / General
- Age: 9-12 years
- Publisher: Scholastic Audio
- Language: English
- Format: audioCD
- Release Date: August 1, 2009
- Date Published: August 1, 2009
- Author: Patrick Carman
- Narrator: David Pittu (Narrator)