In the fall of 1940, the Nazis are at the height of their power - France is occupied, Britian is enduring the Blitz and is under the threat of invasion, America is neutral, and Russia is in an uneasy alliance with Germany. Stephen Metcalfe, the younger son of a prominent American family, is a well-known man about town in occupied Paris. He's also a minor asset in the U.S.'s secret intelligence forces in Europe. Through a wild twist of fate, it falls to Metcalfe to instigate a bold plan that may be the only hope for what remains of the free world. Now he must travel to wartime Moscow to find, and possibly betray, a former love - a fiery ballerina whose own loyalties are in question - in a delicate dance that could destroy all he loves and honors.

American ambassador Stephen Metcalfe has been summoned to find the one man who controls the levers of power in absolute secrecy--an official knowns only as the Dirizhor.

"Welcome to Robert Ludlum's world...fast pacing, tight plotting, international intrigue." — Cleveland Plain Dealer In Robert Ludlum's The Ambler Warning, an agent breaks out of a top-security institution where the government has kept him drugged for years only to discover that he's not the person he thinks he is. On Parrish Island, a restricted island off the coast of Virginia, is a little-known and never-visited psychiatric facility. There, far from prying eyes, the government stores former intelligence employees whose psychiatric states make them a danger to their own government, people whose ramblings might endanger ongoing operations or prove dangerously inconvenient. One of these employees, former Consular Operations agent Hal Ambler, is kept heavily medicated and closely watched. But there's one difference between Hal and the other patients - Hal isn't crazy. With the help of a sympathetic nurse, Hal manages to clear his mind of the drug-induced haze and then pulls off a daring escape. Now he's out to discover who stashed him here and why - but the world he returns to isn't the one he remembers. Friends and longtime associates don't remember him, there are no official records of Hal Ambler, and, when he first sees himself in the mirror, the face that looks back at him is not the one he knows as his own.

Working for United States secret intelligence forces in Europe during the Second World War, Stephen Metcalfe undertakes a bold plan for which he must locate and betray a former lover in order to protect free-world interests.

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.

September 1919: Twenty-year-old Tristan Sadler takes a train from London to Norwich to deliver a clutch of letters to Marian Bancroft. Tristan fought alongside Marian's brother Will during the Great War. They trained together. They fought together. But in 1917, Will laid down his guns on the battlefield and declared himself a conscientious objector, an act which has brought shame and dishonour on the Bancroft family. The letters, however, are not the real reason for Tristan's visit. He holds a secret deep within him. One that he is desperate to unburden himself of to Marian, if he can only find the courage. Whatever happens, this meeting will change his life – forever.

USA Today bestseller For five centuries, a witch’s curse has bound the trolls to their city beneath the ruins of Forsaken Mountain—time enough for their nefarious magic to fade from human memory and into myth. But a prophecy has spoken of a union that will set the trolls free, and when Cécile de Troyes is taken beneath the mountain, she learns there is far more to the myth than she could have imagined. Cécile has only one thing on her mind after she is brought to Trollus: escape. But if she is to succeed, she must bide her time and find a way to outsmart the clever, fast, and inhumanly strong trolls that hold her captive. But while awaiting the perfect opportunity, Cécile unexpectedly falls for the enigmatic troll prince to whom she has been bonded and married. Their love gradually changes her perspective, opening her heart to new friends and opening her eyes to the hardships of the enslaved half-troll, half-human creatures of Trollus. As rebellion brews and the political games of Trollus escalate, Cécile becomes more than a trapped father’s daughter. She becomes a princess, a witch, and the hope of a people—someone who has the power to change Trollus forever.