While getting into his car on the evening of February 16, 1978, the chief of the CIA's Moscow station was handed an envelope by an unknown Russian. Its contents stunned the Americans: details of top-secret Soviet research and development in military technology that was totally unknown to the United States.

In the aftermath of the Cold War, American intelligence caught three high-profile Russian spies: Aldrich Ames, Edward Lee Howard, and Robert Hanssen. However, rumors have long swirled of another mole, one perhaps more damaging than all the others combined. Perhaps the greatest traitor in American history, perhaps a Russian ruse to tear the CIA apart, or perhaps nothing more than a bogeyman, he is often referred to as the Fourth Man.

A landmark collaboration between a thirty-year veteran of the CIA and a Pulitzer Prize-winning journalist, The Main Enemy is the inside story of the CIA-KGB spy wars, told through the actions of the men who fought them. Based on hundreds of interviews with operatives from both sides, The Main Enemy puts us inside the heads of CIA officers as they dodge surveillance and walk into violent ambushes in Moscow. This is the story of the generation of spies who came of age in the shadow of the Cuban missile crisis and rose to run the CIA and KGB in the last days of the Cold War.

Circle of Treason is the first account written by CIA agents who were key members of the CIA team that conducted the intense "Ames Mole Hunt." Sandra Grimes and Jeanne Vertefeuille were two of the five principals of the CIA team tasked with hunting one of their own and were directly responsible for identifying Ames as the mole, leading to his arrest and conviction.

A legal analyst for NPR, NBC, and CNN, delves into the facts surrounding what has been called the “worst intelligence disaster in US history”: the case of Robert Hanssen—a Russian spy who was embedded in the FBI for two decades.

Who was Kim Philby? Those closest to him—like his fellow MI6 officer and best friend since childhood, Nicholas Elliot, and the CIA’s head of counterintelligence, James Jesus Angleton—knew him as a loyal confidant and an unshakeable patriot. Philby was a brilliant and charming man who rose to head Britain’s counterintelligence against the Soviet Union. Together with Elliott and Angleton he stood on the front lines of the Cold War, holding Communism at bay. But he was secretly betraying them both: He was working for the Russians the entire time.

If anyone could be considered a Russian counterpart to the infamous British double-agent Kim Philby, it was Oleg Gordievsky. The son of two KGB agents and the product of the best Soviet institutions, the savvy, sophisticated Gordievsky grew to see his nation's communism as both criminal and philistine. He took his first posting for Russian intelligence in 1968 and eventually became the Soviet Union's top man in London, but from 1973 on he was secretly working for MI6.

With intrigue that rivals the best le Carre novels, Russians Among Us tells the urgent story of Russia’s espionage efforts against the United States and the West from the end of the Cold War to the present.

This revealing memoir from a 34-year veteran of the CIA who worked as a case officer and recruiter of foreign agents before and after 9/11 provides an invaluable perspective on the state of modern spy craft, how the CIA has developed, and how it must continue to evolve.

Just days after the 9-11 attacks, a senior Pentagon analyst eased her red Toyota Echo into traffic and headed to work. She never saw the undercover cars tracking her every turn. As she settled into her cubicle on the 6th floor of the Defense Intelligence Agency in Washington, FBI Agents and twitchy DIA officers were hiding in nearby offices. For this was the day that Ana Montes--the US Intelligence Community superstar who had just won a prestigious fellowship at the CIA--was to be arrested and publicly exposed as a secret agent for Cuba.

Its code name was “Operation Gold”, a wildly audacious CIA plan to construct a clandestine tunnel into East Berlin to tap into critical KGB and Soviet military telecommunication lines. The tunnel, crossing the border between the American and Soviet sectors, would have to be 1,500 feet (the length of the Empire State Building) with state-of-the-art equipment, built and operated literally under the feet of their Cold War adversaries.

In 1946, genius linguist and codebreaker Meredith Gardner discovered that the KGB was running an extensive network of strategically placed spies inside the United States, whose goal was to infiltrate American intelligence and steal the nation's military and atomic secrets. Over the course of the next decade, he and young FBI supervisor Bob Lamphere worked together on Venona, a top-secret mission to uncover the Soviet agents and protect the Holy Grail of Cold War espionage - the atomic bomb.

On June 6, 1944, 150,000 Allied troops landed on the beaches of Normandy and suffered an astonishingly low rate of casualties. A stunning military achievement, it was also a masterpiece of trickery. Operation Fortitude, which protected and enabled the invasion, and the Double Cross system, which specialized in turning German spies into double agents, tricked the Nazis into believing that the Allied attacks would come in Calais and Norway rather than Normandy.

This book reveals the most complete picture ever of the KGB and its operations in the United States and Europe. It is based on an extremely top secret archive which details the full extent of its worldwide network. Christopher Andrew is professor of modern and contemporary history and chair of the history department at Cambridge University, a former visiting professor of national security at Harvard, a frequent guest lecturer at other United States universities, and a regular host of BBC radio and TV programs.

The Unexpected Spy is the riveting story of Walder's tenure in the CIA and, later, the FBI. In high-security, steel-walled rooms in Virginia, Walder watched al-Qaeda members with drones as President Bush looked over her shoulder and CIA Director George Tenet brought her donuts. She tracked chemical terrorists and searched the world for Weapons of Mass Destruction. She created a chemical terror chart that someone in the White House altered to convey information she did not have or believe, leading to the Iraq invasion.

If anyone could be considered a Russian counterpart to the infamous British double-agent Kim Philby, it was Oleg Gordievsky. The son of two KGB agents and the product of the best Soviet institutions, the savvy, sophisticated Gordievsky grew to see his nation's communism as both criminal and philistine. He took his first posting for Russian intelligence in 1968 and eventually became the Soviet Union's top man in London, but from 1973 on he was secretly working for MI6.

In the summer of 1975, 17-year-old Eva Dillon's family was living in New Delhi when her father was exposed as a CIA spy. Eva had long believed that her father was a US State Department employee. She had no idea that he was handling the CIA's highest ranking double agent - Dmitri Fedorovich Polyakov, a Soviet general whose code name was TOPHAT. Dillon's father and Polyakov had a close friendship that went back years, to their first meeting in Burma in the mid-1960s.

Richard Sorge was dispatched to Tokyo in 1933 to serve the spymasters of Moscow. For eight years, he masqueraded as a Nazi journalist and burrowed deep into the German embassy, digging for the secrets of Hitler's invasion of Russia and the Japanese plans for the East. In a nation obsessed with rooting out moles, he kept a high profile - boozing, womanizing, and operating entirely under his own name.

In the fall of 1961, KGB assassin Bogdan Stashinsky defected to West Germany. After spilling his secrets to the CIA, Stashinsky was put on trial in what would be the most publicized assassination case of the entire Cold War. The publicity stirred up by the Stashinsky case forced the KGB to change its modus operandi abroad and helped end the career of Aleksandr Shelepin, one of the most ambitious and dangerous Soviet leaders.

In 1978, CIA maverick Jack Platt and KGB agent Gennady Vasilenko were new arrivals on the Washington, D.C., intelligence scene, with Jack working out of the CIA's counterintelligence office and Gennady out of the Soviet Embassy. Both men were assigned to seduce the other into betraying his country in the final days of the Cold War, but instead the men ended up becoming the best of friends. Theirs is a friendship that never should have happened, and their story is chock full of treachery, darkly comic misunderstandings, bureaucratic inanity, and landmark intelligence breakthroughs.

The Skripal Files is a remarkable and definitive account of Sergei Skripal’s story, which lays bare the new spy war between Russia and the West. Mark Urban, the diplomatic and defense editor for the BBC, met with Skripal in the months before his poisoning, learning about his career in Russian military intelligence, how he became a British agent, his imprisonment in Russia, and the events that led to his release. Skripal’s first-hand accounts and experiences reveal the high stakes of a new spy game that harks back to the chilliest days of the Cold War.

Who was Kim Philby? Those closest to him—like his fellow MI6 officer and best friend since childhood, Nicholas Elliot, and the CIA’s head of counterintelligence, James Jesus Angleton—knew him as a loyal confidant and an unshakeable patriot. Philby was a brilliant and charming man who rose to head Britain’s counterintelligence against the Soviet Union. Together with Elliott and Angleton he stood on the front lines of the Cold War, holding Communism at bay. But he was secretly betraying them both: He was working for the Russians the entire time.

In this true-life thriller, Kati Marton draws on her skill as an investigative reporter to discover who her journalist parents really were---and how they survived the Nazis in Budapest and imprisonment by the Soviets during the Cold War.

From Berlin to the Congo, from Moscow to the back streets of London, these are the stories of the agents on the front lines of British intelligence. And the truth is often more remarkable than fiction.

MI6 has been cloaked in secrecy and shrouded in myth since it was created a hundred years ago. Our understanding of what it is to be a spy has been largely defined by the fictional worlds of Ian Fleming and John le Carré. Gordon Corera provides a unique and unprecedented insight into this secret world and the reality that lies behind the fiction.

A work of remarkable scholarship that moves with the swift pace of a John le Carre thriller, A Spy at the Heart of the Third Reich is a chilling addition to the literature of espionage. In 1943, a young official named Fritz Kolbe from the German foreign ministry arranged to meet with Allen Dulles, then an OSS officer in Switzerland and later the director of the Central Intelligence Agency.

The November 2006 assassination of former Russian intelligence officer Alexander "Sasha" Litvinenko, who was poisoned by the rare radioactive element polonium, caused an international sensation. Within a few short weeks, the fit 43-year-old lay gaunt, bald, and dying in a hospital, the victim of a "tiny nuclear bomb". Suspicions swirled around Russia's FSB, the successor to the KGB, and the Putin regime.

From its haunting chronicle of the monstrous mass murders the Nazis perpetrated and the murky details of their postwar existence to the challenges of hunting them down, Hunting Evil is a monumental work of nonfiction written with the pacing and intrigue of a thriller.

In late 2013, Americans were shocked to learn that a former FBI agent turned private investigator who disappeared in Iran in 2007 was there on a mission for the CIA. The missing man, Robert Levinson, appeared in pictures dressed like a Guantánamo prisoner and pleaded in a video for help from the United States.

On August 8, 1993, a single bullet to the head killed Freddie Woodruff, the Central Intelligence Agency’s station chief in the former Soviet Republic of Georgia. Within hours, police had a suspect - a vodka-soaked village bumpkin named Anzor Sharmaidze. A tidy explanation quickly followed: It was a tragic accident. US diplomats hailed Georgia’s swift work. Yet the bullet that killed Woodruff was never found, and key witnesses have since retracted their testimony, saying they were beaten and forced to identify Sharmaidze. But if he didn’t do it, who did?

In 1944, Benito Mussolini's daughter, Edda, gave Hitler and her father an ultimatum: release her husband, Galeazzo Ciano, from prison, or risk her leaking her husband's journals to the press. To avoid the peril of exposing Nazi lies, Hitler and Mussolini hunted for the diaries for months, determined to destroy them. Hilde Beetz, a German spy, was deployed to seduce Ciano to learn the diaries' location and take them from Edda. Drawing from in‑depth research and first-person interviews, Mazzeo gives listeners a riveting look into this little‑known moment in history.