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.

As World War II raged into its second year, Britain sought a powerful ally to join its cause - but the American public was sharply divided on the subject. The Canadian-born MI6 officer William Stephenson, with his knowledge and influence in North America, was chosen to change their minds by any means necessary.

Spies is the history of the secret war that Russia and the West have been waging for a century. Espionage, sabotage, and subversion were the Kremlin’s means to equalize the imbalance of resources between the East and West before, during, and after the Cold War. There was nothing “unprecedented” about Russian meddling in the 2016 US presidential election. It was simply business as usual, new means used for old ends.

Part Blackhawk Down, part The Riddle of the Sands, former MI6 officer Harry Ferguson has written an extraordinarily gripping non-fiction thriller. Operation Kronstadt not only reveals the early days of intelligence services but also uncovers a truly dramatic story from the Russian Revolution involving a daring rescue attempt and a "mission impossible" against the best defended naval target in Russia.

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.

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 1942, the Gestapo sent out an urgent transmission: "She is the most dangerous of all Allied spies. We must find and destroy her." The target in their sights was Virginia Hall, a Baltimore socialite who talked her way into Special Operations Executive, the spy organization dubbed Winston Churchill's "Ministry of Ungentlemanly Warfare." She became the first Allied woman deployed behind enemy lines and - despite her prosthetic leg - helped to light the flame of the French Resistance, revolutionizing secret warfare as we know it.

1942: World War II is in full swing. Odette Sansom decides to follow in her war hero father’s footsteps by becoming an SOE agent to aid Britain and her beloved homeland, France. Five failed attempts and a plane crash later, she finally lands in occupied France to begin her mission. It is here that she meets her commanding officer, Captain Peter Churchill. As they successfully complete mission after mission, Peter and Odette fall in love. All the while, they are being hunted by the cunning German secret police sergeant, Hugo Bleicher, who finally succeeds in capturing them.

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.

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.

In Mossad, authors MichaelBar-Zohar and Nissim Mishal take us behind the closed curtain with riveting, eye-opening, boots-on-the-ground accounts of the most dangerous, most crucial missions in the agency's 60-year history.

J. Robert Oppenheimer was one of the iconic figures of the 20th century, a brilliant physicist who led the effort to build the atomic bomb but later confronted the moral consequences of scientific progress. When he proposed international controls over atomic materials, opposed the development of the hydrogen bomb, and criticized plans for a nuclear war, his ideas were anathema to powerful advocates of a massive nuclear buildup during the anti-Communist hysteria of the early 1950s.

An explosive, headline-making portrait of Allen Dulles, the man who transformed the CIA into the most powerful - and secretive - colossus in Washington, from the founder of Salon.com and author of the New York Times best seller Brothers.

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.

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.

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.

From the dark days of World War II through the Cold War, Sergey A. Kondrashev was a major player in Russia’s notorious KGB espionage apparatus. Rising through its ranks through hard work and keen understanding of how the spy and political games are played, he “handled” American and British defectors, recruited Western operatives as double agents, served as a ranking officer at the East Berlin and Vienna KGB bureaus, and tackled special assignments from the Kremlin.

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.

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.

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.

Prior to the U.S. entering WWII, a small coterie of British spies in Washington, D.C., was formed. They called themselves the Baker Street Irregulars after the band of street urchins who were the eyes and ears of Sherlock Holmes in some Arthur Conan Doyle stories.

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.

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.

An explosive, headline-making portrait of Allen Dulles, the man who transformed the CIA into the most powerful - and secretive - colossus in Washington, from the founder of Salon.com and author of the New York Times best seller Brothers.

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.

In Trotsky: Downfall of a Revolutionary, Stanford University lecturer Bertrand M. Patenaude tells the dramatic story of Leon Trotsky's final years in exile in Mexico. Shedding new light on Trotsky's tumultuous friendship with painter Diego Rivera, his affair with Rivera’s wife Frida Kahlo, and his torment as his family and comrades become victims of the Great Terror, Trotsky: Downfall ofa Revolutionary brilliantly illuminates the fateful and dramatic life of one of history's most famous yet elusive figures.

Michal Goleniewski, cover name Sniper, was one of the most important spies of the early Cold War. For two and a half years at the end of the 1950s, as a Lt. Colonel at the top of Poland’s espionage service, he smuggled more than 5,000 top-secret Soviet bloc intelligence and military documents, as well as 160 rolls of microfilm, out from behind the Iron Curtain. In January 1961, he abandoned his wife and children and made a dramatic defection across divided Berlin with his East German mistress to the safety of American territory.

This is the secret and suspenseful account of how OSS spymaster Allen Dulles led a network of Germans conspiring to assassinate Hitler and negotiate surrender to bring about the end of World War II before the Soviet's advance. Agent 110 is Allen Dulles, a newly minted spy from an eminent family. Dulles met with and facilitated the plots of Germans who were trying to destroy the country's leadership.

For fans of the Netflix series The Crown, a meticulously researched historical tour de force about the secret ties among Franklin D. Roosevelt, Winston Churchill, the Duke of Windsor, and Adolf Hitler before, during, and after World War II. Andrew Morton tells the story of the feckless Edward VIII, later Duke of Windsor, his American wife, Wallis Simpson, the bizarre wartime Nazi plot to make him a puppet king after the invasion of Britain, and the attempted cover-up by Churchill, General Eisenhower, and King George VI of the duke's relations with Hitler.

A shocking expos on the life and death of political peace activist Mary Pinchot Meyer, whose relationship with John F. Kennedy sheds new light on the circumstances surrounding his assassination. Who really murdered Mary Pinchot Meyer in the fall of 1964? Why was there a mad rush by CIA counterintelligence chief James Angleton to immediately locate and confiscate her diary? What in that diary was so explosive and revealing?