Sam Cogley Books in Order

A secret biological weapon is being unleashed against North Korea’s own citizens, raising the danger of a much wider catastrophe. Operative Adam Knight enters an investigation in which discovering the weapon’s origins is inseparable from deciding whom he can trust.

Injured covert operative Adam Knight is sent after a genetic scientist’s killer, a man believed dead for two years. His international pursuit uncovers a secret weapons program and draws a relentless assassin onto his trail, testing whether he can still complete the mission.

As illegal weapons push the East African nation of Numbani toward civil war, Penumbra Division sends Adam Knight to discover their source. Still carrying the damage of earlier missions, he must navigate rival factions and deception before simmering tensions erupt into open conflict.

Hunted by an assassin after repeatedly disrupting a secret organization, Adam Knight is assigned to investigate a Turkish delegate’s murder in Geneva. Evidence pointing toward a Greek operative threatens war between NATO allies, leaving him little time to expose the forces behind the killing.

In 2002, CIA assassin Lauren Rampling pursues intelligence that Osama bin Laden escaped Afghanistan before the invasion. As a new attack takes shape, her director must defend their secret unit against opposition inside the agency.

A security assignment in Mexico leaves former Marine Dane Winter wounded and isolated after a devastating attack. With local woman Maria Pineda helping him survive, he goes into hiding and begins pursuing the truth behind the operation’s collapse and the enemies responsible.

Adam Knight enters the South American nation of Vincidoria to extract rebel leader Isabella Rodriguez after a failed CIA rescue. Surrounded by secret police, he discovers that her escape is entangled with threats extending beyond the country.

Retired Cold War spymaster John Bishop receives a warning of an imminent attack on America in September 2001. When the source disappears, he leaves isolation in Alaska and relies on old contacts to investigate the threat.

Adam Knight is sent into China to recover the core of a weapon capable of triggering catastrophic earthquakes. With scientists racing to restore it, he must navigate surveillance, rival powers and an alliance whose loyalties may shift.

Dane Winter joins an old comrade investigating a disappearance in a Colorado ski town. As unexplained attacks turn the case into a battle for survival, a snowstorm isolates the community and forces Winter to confront an enemy willing to destroy it.

A return to the mining town of Hollowvale draws Dane Winter into a missing-person investigation and a death dismissed as accidental. Unexplained illnesses suggest a larger conspiracy, and the truth may connect to work he performed there for a private security company.

Surviving the Madrid train bombing draws Penumbra Division director John Bishop back into fieldwork. His personal hunt for the arms dealer who supplied the explosives leads toward Casablanca and unresolved dangers from his Cold War past.

Ordered to stand down, Adam Knight continues hunting the secret organization Rubicon. An uneasy alliance with a former enemy and a colleague's separate investigation uncover a weapon threatening the global order, forcing him to operate outside his agency.

A Penumbra recruit disappears while searching Iraq for weapons of mass destruction in 2003. Lauren Rampling enters Baghdad with mercenaries on an unauthorized rescue, uncovering a secret that threatens both the mission and the already unstable war.

Dane Winter promises a dying Marine he will find his missing daughter, a survivor of human trafficking. The search leads from New Orleans to a secretive Louisiana community and an armed compound whose guards refuse to cooperate.