The New Spymasters: Inside Espionage from the Cold War to Global Terror, by Stephen Grey

[Michael Barwell]

Pretty good book this; oblique, but the only in-print reference to the cortical modem effect I've read.

"In this era of email intercepts and drone strikes, many believe that the spy is dead. What use are double agents and dead letter boxes compared to the all-seeing digital eye?They couldn't be more wrong. The spying game is changing, but the need for walking, talking sources who gather secret information has never been more acute. And they are still out there.
In this searing modern history of espionage, Stephen Grey takes us from the CIA's Cold War legends, to the agents who betrayed the IRA, through to the spooks inside Al-Qaeda and ISIS. Techniques and technologies have evolved, but the old motivations for betrayal - patriotism, greed, revenge, compromise - endure. This is a revealing story of how spycraft and the 'human factor' survive, against the odds.
Based on years of research and interviews with hundreds of secret sources, many of the stories in the book have never been fully told. The New Spymasters will appeal to fans of John le Carre, Jason Bourne and Ben Macintyre.
Stephen Grey is a British writer, broadcaster and investigative reporter with over two decades of experience of reporting on intelligence issues. He is best known for his world exclusive revelations about the CIA's program of 'extraordinary rendition', as well as reports from Iraq and Afghanistan. A former foreign correspondent and investigations editor with the Sunday Times, he has reported for the New York Times, Guardian, BBC and Channel 4, and is currently a special correspondent with Reuters. Grey is the author of Ghost Plane (2007), on the CIA, and Operation Snakebite (2009) about the war in Helmand, Afghanistan."