Eric O’Neill was only 26 when he was tapped for the case of a lifetime: a one-on-one undercover investigation of the FBI’s top target, a man suspected of spying for the Russians for nearly two decades, giving up nuclear secrets, compromising intelligence, and betraying US assets. With zero training in face-to-face investigation, O’Neill found himself in a windowless, high-security office in the newly formed Information Assurance Section, tasked officially with helping the FBI secure its outdated computer system against hackers and spies - and unofficially with collecting evidence against his new boss.

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.

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.

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.

In 1988 Joe Navarro, one of the youngest agents ever hired by the FBI, was dividing his time between SWAT assignments, flying air reconnaissance, and working counterintelligence. But his real expertise was "reading" body language. He possessed an uncanny ability to glean the thoughts of those he interrogated.

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.

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.

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.

On a sunlit morning in September 1978, a sloop drifts aimlessly across the Chesapeake Bay. The cabin reveals signs of a struggle, and “classified” documents, live 9 mm cartridges, and a top-secret “burst” satellite communications transmitter are discovered aboard. But where is the boat’s owner, former CIA officer John Paisley? One man may hold the key to finding out. Tennent “Pete” Bagley was once a rising star in America’s spy aristocracy, and many expected he’d eventually become CIA director.

Jim Nicholson was one of the CIA's top veteran case officers. By day he taught spycraft at the CIA's clandestine training center, The Farm. By night he was a minivan-driving single father racing home to have dinner with his kids. But Nicholson led a double life. For more than two years, he had met covertly with agents of Russia's foreign intelligence service and turned over troves of classified documents. In 1997 Nicholson became the highest-ranking CIA officer ever convicted of espionage.

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.

In the late 1970s, the National Security Agency still did not officially exist - those in the know referred to it dryly as the No Such Agency. So why, when NSA engineer Charles Gandy filed for a visa to visit Moscow, did the Russian Foreign Ministry assert with confidence that he was a spy? Outsmarting honey traps and encroaching deep enough into enemy territory to perform complicated technical investigations, Gandy accomplished his mission in Russia but discovered more than State and CIA wanted him to know.

Eddie Chapman was a charming criminal, a con man, and a philanderer. He was also one of the most remarkable double agents Britain has ever produced. Inside the traitor was a man of loyalty; inside the villain was a hero. The problem for Chapman, his spymasters, and his lovers was to know where one persona ended and the other began.

Ana Montes had spent seventeen years spying for the Cubans. She had been raised in a patriotic Puerto Rican household: Her father, a psychiatrist, was a former colonel in the US Army. Her sister worked as a translator for the FBI and helped break up a ring of Cuban spies in Miami. Her brother was also a loyal FBI agent. Montes impressed her bosses but in secret spent her breaks memorizing top-secret documents before sending them to the Cuban government. Retired FBI agent Peter J. Lapp explains the clues that led their team to catch one of the United States’ most dangerous spies.

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.

Eric O’Neill was only 26 when he was tapped for the case of a lifetime: a one-on-one undercover investigation of the FBI’s top target, a man suspected of spying for the Russians for nearly two decades, giving up nuclear secrets, compromising intelligence, and betraying US assets. With zero training in face-to-face investigation, O’Neill found himself in a windowless, high-security office in the newly formed Information Assurance Section, tasked officially with helping the FBI secure its outdated computer system against hackers and spies - and unofficially with collecting evidence against his new boss.

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.

This is the book the CIA does not want you to read. For the last 60 years, the CIA has maintained a formidable reputation in spite of its terrible record, never disclosing its blunders to the American public. It spun its own truth to the nation while reality lay buried in classified archives. Now, Pulitzer Prize-winning New York Times reporter Tim Weiner offers a stunning indictment of the CIA, a deeply flawed organization that has never deserved America's confidence.

As the American hostage crisis in Iran boiled into its seventh month in the spring of 1980, six heavily armed gunman barged into the Iranian embassy in London, taking twenty-six hostages. What followed over the next six days was an increasingly tense standoff, one that threatened at any moment to spill into a bloodbath.

Jim Nicholson was one of the CIA's top veteran case officers. By day he taught spycraft at the CIA's clandestine training center, The Farm. By night he was a minivan-driving single father racing home to have dinner with his kids. But Nicholson led a double life. For more than two years, he had met covertly with agents of Russia's foreign intelligence service and turned over troves of classified documents. In 1997 Nicholson became the highest-ranking CIA officer ever convicted of espionage.

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.

In the late 1970s, the National Security Agency still did not officially exist - those in the know referred to it dryly as the No Such Agency. So why, when NSA engineer Charles Gandy filed for a visa to visit Moscow, did the Russian Foreign Ministry assert with confidence that he was a spy? Outsmarting honey traps and encroaching deep enough into enemy territory to perform complicated technical investigations, Gandy accomplished his mission in Russia but discovered more than State and CIA wanted him to know.