The Collaborator — Ian Kharitonov

Terrorists strike in the heart of Moscow, leaving search-and-rescue commander Eugene Sokolov shell-shocked. Soon, his brother Constantine traces the attack to a family secret that will change history.
Chaos reigns. The Kremlin teeters on the brink of downfall.
From the seedy alleys of Paris to the Russian wilderness, Eugene and Constantine embark on a deadly mission to expose the criminal plot.
But a shadowy oligarch will stop at nothing to kill them and protect the ultimate conspiracy of World War II.