HenriButter
Emil

Spy

Smiley's People
Call for the Dead
The Spy Who Came in from the Cold
Tinker Tailor Soldier Spy
Deep Undercover
Liar, Temptress, Soldier, Spy
The Spies Who Never Were: The True Story of the Nazi Spies Who Were Actually Allied Double Agents
A Spy Among Friends: Kim Philby and the Great Betrayal
The Triple Agent: The al-Qaeda Mole who Infiltrated the CIA
The Billion Dollar Spy
Agent Zigzag
Bodyguard of Lies
Spycraft: The Secret History of the CIA's Spytechs, from Communism to al-Qaeda
The Cambridge Spies: The Untold Story of Maclean, Philby, and Burgess in America
The File: A Personal History
Surprise, Kill, Vanish: The Secret History Of CIA Paramilitary Armies, Operators, And Assassins
The Spy and the Traitor: The Greatest Espionage Story of the Cold War