The Spy Who Came in From the Cold by John le Carré

This novel is a fascinating tale of espionage during the Cold War, centered around a British intelligence officer who is seemingly ready to end his spy career. However, he is given one last mission before his retirement: to bring down the head of East German Intelligence. As he navigates the dangerous world of spies and double agents, he is forced to confront his own past and the sacrifices he has made for his country. The story is a complex exploration of morality, loyalty, and the personal cost of political conflict.

The 171st greatest book of all time