Nikolai Khokhlov was a Soviet war hero and agent selected for a dangerous mission: kill a Russian dissident in Frankfurt, West Germany. Khokhlov went to Frankfurt as ordered, but his actions there shocked his superiors in Moscow, and opened a new chapter in the Cold War.

The question I am asked most frequently is what books I recommend for further reading on the topics I write about. There are a trove of fascinating true tales of espionage out there, and I want to share with you seven more books that are sure to hold your interest and take you down new paths.

Arguably the most famous Russian assassination-by-poisoning occurred on November 1st 2006, when Alexander Litvinenko, a former member of the Russian Federal Security Service (FSB) suddenly fell ill after a meeting in London with some of his old comrades.

Former GRU Colonel Sergei Skripal was living a quiet life in Salisbury England when some of his old colleagues came calling in March 2018. He had earned the ire of Vladimir Putin years earlier, and Putin was not one to forgive or forget his enemies.