"A classic according to your personal interpretation" was how we got the list of books this month and as a result, Darkness at Noon by Arthur Koestler was picked out of the hat.
A modern classic that was published in 1940, Darkness at Noon is a book concerned with the show trials of the USSR. Although Stalin is never named (presumably to protect the other), it is based upon the 1938 purges orchestrated by Stalin when unwanted Communist party members were ousted from the party and widespread police surveillance led to the repression of peasants.
The book is the second book in a trilogy, beginning with "The Gladiators", looking at the revolt of Spartacus, and ending with "Arrival and Departure" which tracked the journey of a WWII refugee.
While looking up about the book I discovered that Koestler handed his (only) manuscript to a friend to bring from Paris to England while he had to fight in North Africa. He abandoned the army and was waiting for his own ship to England when he was informed that the ship with his friend and manuscript on had been torpedoed and all aboard lost. Koestler subsequently attempted suicide, but luckily was not successful as the rumour turned out to be false and the manuscript was safe and well in England awaiting publication.