While on a visit to the United States, Pope Pius XIII is kidnapped by a terrorist cell calling itself the Soldiers of Islam. If the United States and its allies do not meet their demands, they will execute the pope. FBI Specialist Shari Cohen is called to duty to track down the terrorist cell responsible, and she soon learns that she is not alone.

Deep behind the Vatican walls, a secret order dispatches a clandestine group of elite commandos known as the Vatican Knights. Their mission: bring the pope back alive.

Nobody has ever heard of ODIN. ODIN is about as secret as a government agency can get. Because within ODIN there is General Operations, which speaks for itself; ODIN 5i, which deals with intelligence gathering; and then there is ODIN 1i, which deals in operations so sensitive not even the CIA can touch them. All three are run with an iron first by The Chief, a giant with a gigantic IQ. His top agent is Alex Mason. But when an ODIN 5i agent based at the US Embassy in Manila goes missing and his encrypted laptop disappears with him, the whole ODIN structure is put in peril.

When ex-MI5 operative Joe Mason is sent to Rome to guard an elderly professor and his daughter, he thinks he’s in for an easy ride. But on their first day in the Vatican secret archives, a masked assassin gains entry, shoots Joe’s client in cold blood and steals an ancient manuscript. Giving chase, Joe can’t imagine what could lie within those pages that would make someone willing to kill. The search for answers leads Joe and his comrades in a race against time, across continents and into treacherous mountains.

During the election of a new Pope in the mid-18th century, famed violinist Antonio Vivaldi learns of a ring of art forgers who are replacing the Vatican’s priceless treasures with expertly-painted fakes. Desperate, the composer hides a message in a special melody, hoping someone, someday, will take down the culprits....

A master assassin craves one thing above all else: a normal everyday life. Trained to be a killer from the age of 11, Peter has never known the things the average person takes for granted. He has always been an asset. Burned by the CIA and now occupying their secret hit list, he works overseas as a Ronin, living a solitary life in hiding. But someone knows where he is. A strange man arrives at his door offering Peter the chance of a real life. "Get this done and you can be free," he is told.