Phineas Fox is employed to verify a document that was find at the site of the destroyed Chopin Library in Warsaw. But is there a link between the Library and the music discovered in the document, known as the Dark Cadence. But what are the connections to the past, and how will it reflect on the present. An interesting well-written story starting in 1918 and concluding in the present day with the revelations of buried secrets.

Another excellent mystery featuring Phineas Fox, this series is becoming a favorite. The plot is gripping and entertaining, the historical background well researched and vivid, the characters are fleshed out. I loved the solid mystery, full of twists and turns, that kept me guessing. Highly recommended. Many thanks to the publisher and Netgalley for this ARC, all opinions are mine