Mark Greaney Books in Order (Updated September 9, 2026)

Mark Greaney is an American thriller writer best known for creating Court Gentry, the former CIA operative and assassin called the Gray Man. He also writes the Josh Duffy series and spent several years writing inside Tom Clancy’s Jack Ryan universe, first alongside Clancy and later as a solo continuation author.

Most readers should begin with The Gray Man. Court Gentry’s story now stretches across fifteen published novels, with a sixteenth, Dark Union, officially scheduled for February 2027. The books increasingly depend on Court’s history with the CIA, Zack Hightower, Matt Hanley, Zoya Zakharova, Suzanne Brewer, and the covert unit later known as Ghost Town, so publication order is the safest route.

Find your way into Mark Greaney

• For Court Gentry: start with The Gray Man.
• For the strongest long-term continuity: keep all Gray Man novels in publication order.
• For Josh Duffy: begin with Armored.
• For Mark Greaney’s Jack Ryan work: distinguish the three books written with Tom Clancy from Greaney’s later solo Ryan novels.
• Latest published Gray Man: The Hard Line, released February 17, 2026.
• Next confirmed Gray Man: Dark Union, scheduled for February 16, 2027.

Readers interested only in Greaney’s original characters can skip the Jack Ryan books. They belong to Tom Clancy’s larger continuity rather than the Gray Man or Josh Duffy worlds.

Court Gentry’s Gray Man novels, one mission at a time

1. The Gray Man (2009): Former CIA operative Court Gentry is working as a contract assassin when a powerful Nigerian businessman places an enormous bounty on his head, forcing Court to cross Europe while professional killers converge on him and people he cares about are used as leverage.
2. On Target (2010): A man from Court’s past recruits him for what begins as an assassination assignment and changes into a nearly impossible kidnapping in Sudan, while the CIA that once betrayed Court becomes involved again.
3. Ballistic (2011): Court seeks refuge with the family of a Mexican friend who once saved his life, only to discover that a violent cartel has targeted them, turning a personal debt into a war against organized crime.
4. Dead Eye (2013): Another elite assassin begins tracking Court across Europe, and the similarities between hunter and target force Court to confront what separates his own moral code from that of a killer who appears almost professionally identical.
5. Back Blast (2016): After years as a fugitive, Court secretly returns to Washington to discover why the CIA issued a kill order against him, reopening Operation Back Blast and the betrayal that created the Gray Man.
6. Gunmetal Gray (2017): Court is allowed back into CIA service but immediately receives a difficult mission in Asia involving a Chinese cyberwarfare specialist, old ally Donald Fitzroy, and Chinese intelligence units determined to control the same target.
7. Agent in Place (2018): Syrian expatriates hire Court to abduct the mistress of Syria’s dictator, but the mission changes when he discovers that the woman has hidden the president’s young son and that several factions are prepared to kill the child.
8. Mission Critical (2019): Court witnesses an attack connected to a prisoner transfer and follows the trail toward an international conspiracy while CIA officer Zoya Zakharova becomes increasingly important to both the operation and Court’s personal life.
9. One Minute Out (2020): During a mission in Croatia, Court uncovers a human-trafficking network stretching from the Balkans to wealthy customers in the United States, but his desire to destroy it conflicts with the CIA’s need to extract intelligence from the men involved.
10. Relentless (2021): American intelligence officers are disappearing around the world, sending Court after a surviving agent while Zoya infiltrates a private intelligence company whose connections suggest that the abductions are part of a much larger operation.
11. Sierra Six (2022): A present-day encounter with a terrorist Court believed dead forces him to remember an early CIA mission when he was Sierra Six, the junior member of an action team whose first major operation ended at a terrible cost.
12. Burner (2023): A fugitive banker carrying explosive financial intelligence becomes the object of a global pursuit, placing Court and Zoya on opposing sides of an operation involving Russian money, Western intelligence, and secrets with geopolitical consequences.
13. The Chaos Agent (2024): The suspicious deaths of robotics and artificial-intelligence experts reveal a battle over autonomous weapons, drawing Court and Zoya into a conflict where private technology can be as strategically dangerous as a national military program.
14. Midnight Black (2025): Zoya is imprisoned inside Russia and believed dead by the CIA, but Court refuses to accept that conclusion and launches a desperate effort to reach her through a network that once helped dissidents escape the Soviet system.
15. The Hard Line (2026): Court is operating with Matt Hanley’s off-the-books Ghost Town team when coordinated attacks begin targeting American intelligence personnel, while a legendary assassin called Whetstone turns the conflict toward Court’s estranged family.
16. Dark Union (expected February 16, 2027): Court believes he is the last surviving member of his family until he apparently sees Chance, the brother he thought died years earlier as a police officer, sending him into a search that threatens what he believes about his own past.

As of September 9, 2026, the first fifteen Gray Man novels are published. Dark Union is officially listed as Book 16 but should remain marked Upcoming until its February 2027 release.

The first four books show Court as an outsider

The original Gray Man run presents Court as a man who has been cut loose by the CIA and survives through private contracts, old contacts, and constant movement.

1. The Gray Man: Establishes Court as the betrayed former operative everyone believes can be hunted.
2. On Target: Forces him into direct contact with the Agency that abandoned him.
3. Ballistic: Makes loyalty to an old friend more important than professional survival.
4. Dead Eye: Gives Court an assassin opponent who resembles him enough to make the conflict psychological as well as physical.

These books can each deliver a self-contained mission, but together they establish the version of Court who distrusts institutions and relies on a personal code rather than official authorization.

Back Blast answers the question hanging over the series

For four books, Court knows the CIA wants him dead but does not fully understand why. Back Blast finally forces him to return to Washington and investigate the operation that destroyed his official career.

This makes Book 5 a major structural turning point. Later Gray Man novels increasingly reconnect Court with American intelligence, so starting with Gunmetal Gray skips the book that explains how that relationship changes.

From Gunmetal Gray onward, Court is no longer simply a fugitive

1. Gunmetal Gray: Court receives a CIA mission after years outside official service.
2. Agent in Place: He works a nominally private operation in Syria that becomes morally more complicated than its sponsors expected.
3. Mission Critical: Court’s work again intersects heavily with CIA personnel and Zoya.
4. One Minute Out: His personal moral objective clashes directly with intelligence priorities.

This period is important because Court never becomes an unquestioning government operative again. His value to the CIA comes partly from the fact that he will disregard an order when his own judgment tells him the mission has crossed a line.

Zoya Zakharova becomes essential to the later books

Zoya develops from a Russian intelligence figure into one of the most important people in Court’s life. By Relentless, Burner, and the books that follow, she is no longer an occasional supporting character.

That continuity reaches a crisis in Midnight Black, where Court’s belief that Zoya is still alive becomes the reason for an extraordinarily dangerous effort to enter Russia. Reading that book without the earlier Zoya material turns a personal rescue into a generic mission.

Sierra Six is a prequel inside a present-day novel

Sierra Six contains substantial material from Court’s early CIA career, when he was the least experienced operator on an action team.

Do not move it to the front of the series. The present-day plot and the emotional weight of Court’s memories depend on knowing the older Gray Man first. Publication position after Relentless is the better first-reading choice.

The Hard Line shifts attention toward Court’s family

By Book 15, Court has acquired a kind of professional family through Matt Hanley and Ghost Town. The Hard Line then contrasts those relationships with Court’s biological family when an assassin called Whetstone targets people connected to him.

The story also brings Court’s father back into his life after roughly two decades of estrangement. That family emphasis leads naturally toward the premise of Dark Union, where the supposedly dead Chance Gentry becomes central.

What Dark Union will add to the Gray Man story

Dark Union is officially scheduled as Gray Man Book 16 for February 16, 2027. Its premise begins after Court has long believed his police-officer brother Chance died in the line of duty.

Because Court apparently glimpses Chance at their father’s funeral, the upcoming novel is positioned as another family-history story rather than an unrelated assignment. Readers should therefore complete The Hard Line first.

Josh Duffy books in order

Josh Duffy is a former elite protection operator who lost his lower leg during a mission in Lebanon. His series focuses on close protection, diplomatic security, family responsibility, private military work, and the risks faced by professionals hired to keep other people alive.

1. Armored (2022): After losing his leg while protecting a client, Josh is reduced to working mall security until an old contact offers him a job guarding a United Nations peace mission entering cartel-controlled mountains in Mexico.
2. Sentinel (2024): Josh and his wife Nikki are working for the State Department’s Diplomatic Security Service in Ghana when an American diplomatic visit is overtaken by a coup, a Chinese operation, and an attack on a major dam while their children are also in the country.

Read Armored before Sentinel. The first book establishes Josh’s injury, family, return to operational work, and the skills that later place both Josh and Nikki inside government protection assignments.

Armored began as an audio project

The novel Armored grew from Greaney’s earlier Audible Original drama of the same name. The print novel expands Josh Duffy’s story rather than functioning as a separate continuity.

Readers only need the novel to begin the current Josh Duffy book sequence.

Mark Greaney in the Jack Ryan universe

Greaney’s connection with Tom Clancy began while Clancy was still alive. The pair collaborated on three Jack Ryan novels, after which Greaney wrote several additional books in the franchise on his own.

Books written with Tom Clancy

1. Locked On (2011): Jack Ryan Sr. campaigns to return to the White House while Jack Ryan Jr. and the Campus confront terrorism, a Pakistani nuclear threat, and an operation designed to destroy John Clark’s reputation.
2. Threat Vector (2012): Political crisis inside China pushes the country toward aggression against Taiwan while a sophisticated cyberwar operation targets American interests and threatens to expose the Campus.
3. Command Authority (2013): Russian leader Valeri Volodin’s modern ambitions connect to secrets from Jack Ryan Sr.’s early CIA career, combining contemporary Russian expansion with a decades-old KGB mystery.

Command Authority was the final Jack Ryan novel Tom Clancy co-authored before his death in 2013.

Greaney’s solo Tom Clancy novels

1. Tom Clancy Support and Defend (2014): Campus operator Dominic Caruso becomes the lead when a national-security official carrying highly damaging classified data goes on the run and several foreign groups race to capture him.
2. Tom Clancy Full Force and Effect (2014): North Korea’s discovery of valuable mineral resources gives its regime a possible path toward completing its nuclear ambitions while Jack Ryan Jr. and the Campus investigate a related intelligence trail.
3. Tom Clancy Commander in Chief (2015): Russian president Volodin uses apparently unrelated attacks and covert operations to weaken Western unity before making a larger move against NATO territory.
4. Tom Clancy True Faith and Allegiance (2016): A massive leak of American military and intelligence personnel data allows hostile governments and terrorist groups to target individuals around the world, forcing the Campus to identify the source.

These books belong to Tom Clancy’s long-running Jack Ryan chronology. They should not be inserted between Gray Man novels simply because Greaney wrote them during the same years.

If you want all of Greaney without mixing universes

1. Read the Gray Man sequence from The Gray Man through The Hard Line.
2. Keep Dark Union marked upcoming until February 2027.
3. Move to Armored and then Sentinel for Josh Duffy.
4. Read the Jack Ryan books separately if you are also following Tom Clancy’s universe.

This approach keeps Court Gentry’s personal continuity intact and prevents Jack Ryan books written during the same years from making the chronology look more complicated than it is.

Can the Gray Man books be read out of order?

Some individual missions can be understood without every earlier book. Agent in Place, for example, has a clear Syrian operation, while One Minute Out has its own trafficking investigation.

The larger story is increasingly serialized, however. Court’s CIA status changes in Back Blast, Zoya becomes central later, Midnight Black depends heavily on their relationship, and The Hard Line opens family history that continues into Dark Union. Publication order is therefore strongly preferable.

Current Gray Man release position

The Hard Line, published February 17, 2026, is the latest available Gray Man novel and Book 15.

Dark Union is confirmed as Book 16 and is scheduled for February 16, 2027. It is not yet part of the published reading checklist as of September 9, 2026.

Mark Greaney reader questions

What is the first Gray Man book?

The Gray Man, published in 2009, introduces Court Gentry.

How many Gray Man books are published?

There are fifteen published novels as of September 2026, ending with The Hard Line.

What is Gray Man Book 16?

Dark Union is Book 16 and is officially scheduled for February 16, 2027.

Should Sierra Six be read first because part of it is a prequel?

No. Read it in publication position after Relentless. Its flashback material is designed for readers who already know the older Court Gentry.

When does Court return to CIA work?

Back Blast resolves much of the mystery behind his original CIA betrayal. Gunmetal Gray then places him back inside an Agency mission.

Who is Zoya Zakharova?

Zoya is a Russian intelligence operative who becomes Court’s lover and one of the most important continuing characters in the later Gray Man novels.

What is the first Josh Duffy book?

Armored begins the Josh Duffy series, followed by Sentinel.

Did Mark Greaney write Tom Clancy novels?

Yes. He co-wrote Locked On, Threat Vector, and Command Authority with Tom Clancy, then wrote four additional Jack Ryan or Campus novels on his own.

The route that preserves Court Gentry’s evolution

Begin with The Gray Man and stay in publication order. That lets Court progress naturally from betrayed CIA fugitive to independent assassin, reluctant Agency asset, partner to Zoya, member of Ghost Town, and a man increasingly forced to confront the family history he spent years avoiding.

After The Hard Line, wait for Dark Union rather than substituting a Josh Duffy or Jack Ryan book as the next Gray Man installment. Those books belong to separate series even though Greaney writes them with the same attention to modern intelligence and special operations.