Prometheus Deception Robert Ludlum is the acknowledged master of suspense and international intrigue. For over thirty years, in over twenty international bestsellers, he has a set a standard that has never been equaled. Now, with the Prometheus Deception, he proves that he is at the very pinnacle of his craft. Nicholas Bryson spent years as a deep cover operative for the American secret intelligence group, the Directorate. After critical undercover mission went horribly wrong, Bryson was retired to a new identity. Years later, his closely held cover is cracked and Bryson learns that the Directorate was not what it claimed - that he was a pawn in a complex scheme against his own country's interests. Now, it has become increasingly clear that the shadowy Directorate is headed for some dangerous endgame - but no one knows precisely who they are and what they are planning. With Bryson their only possible asset, the director of the CIA recruits Bryson to find, reinfiltrate, and stop the Directorate. But after years on the sidelines, Bryson's field skills are rusty, his contacts unreliable, and his instincts suspect. With everything he thought he knew about his own life in question, Bryson is all alone in a wilderness of mirrors - unsure what is and isn't true and who, if anyone, he can trust - with the future of millions in the balance. Sigma Protocol Ben Hartman is vacationing in Zurich, Switzerland when he chances upon his old friend Jimmy Cavanaugh—a madman who's armed and programmed to assassinate. In a matter of minutes, six innocent bystanders are dead. So is Cavanaugh. But when his body vanishes, and his weapon mysteriously appears in Hartman's luggage, Hartman is plunged into an unfathomable nightmare... Meanwhile, Anna Navarro, field agent for the Department of Justice, has been asked to investigate the sudden, random deaths of eleven men throughout the world. The only thing that connects them? A secret file, over a half-century old, that's linked to the CIA—and is marked with the same puzzling codename: Sigma. As Anna follows the connecting thread—and Hartman finds himself on the run—she ends up in the shadows of a relentless killer who is one step ahead of her...victim by victim. Now, she and Hartman together must uncover the diabolical secrets long held behind Sigma. It will threaten everything they think they know about themselves—and confirm their very worst fears...

Two suspense novels in one volume. In the Prometheus deception, a "retired" agent is brought back to find out where, among the members of his former team, corruption has set in. In the Sigma protocol, a mystified agent and an innocent bystander find themselves threatened by the mystery behind the codename "Sigma."

After an old friend tries to kill an investment banker, he teams up with a field agent in Europe to solve the mystery of what really happened after World War II, and what the CIA code word of SIGMA represents.

Nicholas Bryson, an agent for a covert American group called the Directorate, comes out of retirement after learning the Directorate is actually a traitorous group and joins forces with the CIA to put a stop to their actions.

Now comes The Sigma Protocol, a new breakneck novel of intrigue, conspiracy, and terrifying deception. American investment banker Ben Hartman arrives in Zurich for a ski holiday, the first time he's been back to Switzerland since his twin brother died there in a tragic accident four years earlier. But his arrival in Zurich triggers something far more sinister than his brother's fate. When Ben chances upon Jimmy Cavanaugh, an old college friend, Cavanaugh promptly pulls out a gun and tries to kill him. In a matter of minutes, several innocent bystanders are dead - as well as Cavanaugh - and Ben has barely managed to survive. Plunged into an unspeakable nightmare, Hartman suddenly finds himself on the run. Department of Justice field agent Anna Navarro is being stalked around the world by a relentless killer, managing to survive the killer's attacks only by a combination of luck, skill and her own quick wits. These attacks are somehow related to her current assignment: investigating the sudden - and seemingly unrelated - deaths of a number of very old men throughout the world. The only thing that connects them is a file in the CIA archives, over a half-century old, marked with the same puzzling code word: SIGMA. But someone or something is always seemingly one step ahead of her, the survivors are rapidly dwindling, and her own life is in ever increasing danger. Brought together by accident, Ben and Anna soon realize that their only hope of survival lies with each other. Together they race to uncover the diabolical secrets long hidden behind the code word, Sigma. Secrets that threaten everything they think they know about themselves, everything they believed true about their friends and families, and everything they were ever taught about history itself. For behind Sigma lies a vast deception that is finally coming to fruition and the fate and future of the world is in their hands.

Robert Ludlum is the acknowledged master of suspense and international intrigue. For over thirty years, in over twenty international bestsellers, he set a standard that has never been equaled. The Prometheus Deception is one of his finest, most prescient thrillers. Nicholas Bryson spent years as a deep cover operative for the American secret intelligence group, the Directorate. After a critical undercover mission went horribly wrong, Bryson was retired to a new identity. Years later, his closely held cover is cracked and Bryson learns that the Directorate was not what it claimed--that he was a pawn in a complex scheme against his own country's interests. Now, it has become increasingly clear that the shadowy Directorate is headed for some dangerous endgame--but no one knows precisely who they are and what they are planning. With Bryson their only possible asset, the director of the CIA recruits him to find, reinfiltrate, and stop the Directorate. But after years on the sidelines, Bryson's field skills are rusty, his contacts unreliable, and his instincts suspect. With everything he thought he knew about his own life in question, Bryson is all alone in a wilderness of mirrors--unsure what is and isn't true and who, if anyone, he can trust--with the future of millions in the balance.