Spying came to him as making love comes to other men. It is his belief, in fact, that his father may have had relations with the Okhrana, the czar’s intelligence service, though his murder by the Turks was haphazard—simply one act in a village slaughter. But Avram knew them, whether they were Turkish Aghas or British officers, he always understood how they worked, where their vulnerabilities lay.
Night Soldiers is the first book in a long series, 14 books, of espionage novels in Europe starting in the 1930s and through World War II. It is a fictional story following Khristo Stoianev, a Bulgarian, who is recruited by NKVD, sent to Spain during the civil war, then escaped to Paris. The action moves all around Europe, from Bulgaria to Moscow, from Madrid to Paris, to Switzerland.

Spying activities of Bolsheviks, Spanish civil war factions, underground activities of French patriots, Nazi Gestapo are all presented through the eyes of the protagonist, in a gritty, tense and grey atmosphere.
In 1934, Stoianev sees his brother beaten to death by local fascists, so takes refuge with the communists, being sent for training in Moscow. He is then sent to Spain during the civil war. The Soviet purges caught him there, where he escapes, fleeing to Paris, but he still cannot shake the long hand of NKVD. The action moves then briefly to the US where the OSS is formed, then back to Europe with the French resistance. The transition between stories is smooth and the reader can feel the tense atmosphere from each country caught in the war.
The writing is captivating, with an imaginative, but not overly complicated plot. Despite presenting sometimes the mundane of life, Alan Furst keeps the reader on the edge. You can feel the tension brought by war and spying, just waiting for the moment to be discovered or to make a mistake.
The decisions of the main characters are well explained, seem genuine and keep the story compact. The reader knows in every moment why a character decided to act in a certain way, what is their motivation, desires. The character creation and the atmosphere created is top notch.
A recommended read for long winter nights.