New York Times Bestseller Dr. Jonathan Ransom, a surgeon for Doctors Without Borders, is climbing in the Swiss Alps with his wife, Emma, when she falls into a hidden crevasse and dies. Twenty-four hours later, Jonathan receives an envelope addressed to his wife containing two baggage-claim tickets. Puzzled, he journeys to a railway station only to find himself inexplicably attacked by the Swiss police. Suddenly forced on the run, Jonathan's only chance at survival lies in uncovering the devastating truth behind his wife's secret life.

A riveting sequel to the New York Times bestseller Rules of Deception that confirms Christopher Reich as the master of the espionage thriller. Months after foiling an attack on a commercial jetliner, Doctors Without Borders physician Jonathan Ransom is working under an assumed name in a remote corner of Africa while his wife, Emma, desperate to escape the wrath of Division, the secret American intelligence agency she betrayed, has vanished into the netherworld of international espionage. Both look forward to sharing a stolen weekend in London—until an ambush on a convoy of limousines turns their romantic rendezvous into a terrorist bloodbath.In the aftermath, Emma disappears and Jonathan is apprehended by the police and threatened with life imprisonment unless he helps secure his wife’s capture. Faced with an impossible decision, Jonathan makes a daring escape. On the run, he realizes that his only option is to become a spy himself in order to track down Emma and discover the true nature of the conspiracy she appears to be masterminding. In the process, Jonathan begins to realize that all along he’s been a pawn in a high-stakes game of international intrigue and one-upsmanship far beyond his imagining.

The most riveting novel yet in Christopher Reich’s New York Times bestselling series—featuring Dr. Jonathan Ransom and his undercover-agent wife Emma, a dangerous woman with a mysterious past who has gone rogue in the high-stakes, serpentine world of international spies. In 1980, a secret American B-52 crashes high in a remote mountain range on the Pakistan–Afghanistan border. Nearly thirty years later, and spanning locales from those peaks to New York City, a terrible truth will be revealed.Jonathan Ransom returns as the resourceful doctor thrown into a shadowy world of double and triple agents where absolutely no one can be trusted. To stay alive, Ransom must unravel the mystery surrounding his wife—an enigmatic and lethal spy who plays by her own rules—and discover where her loyalties truly lie. Rules of Betrayal is a masterfully plotted novel that cements Christopher Reich’s reputation as one of the most admired espionage thriller writers today.