Halo Books in Order

In the twenty-sixth century, the UNSC turns to Dr. Catherine Halsey's clandestine program, which recruits seventy-five children, including John. As he becomes Spartan John-117, humanity's conflict with colonial rebels is overtaken by the looming Covenant threat.

In the aftermath of Reach's destruction and Halo's fall, the surviving Spartans fight on separate fronts. While Fred-104 and Kelly-087 are trapped on Reach with Dr. Halsey, the Master Chief and Cortana move against a Covenant fleet preparing to attack Earth.

On Halo, Master Chief and Cortana fight Covenant forces while scattered Marines struggle to survive on the ring. The novel follows the first game's campaign but adds new viewpoints, especially among human survivors and Covenant hunters.

As the Master Chief defends Earth, a secret ONI unit launches a plan on the nearly abandoned planet Onyx. Ancient Forerunner technology awakens there, prompting UNSC and Covenant forces to race for control while a new power threatens both sides.

On the frontier colony Harvest, first contact with the Covenant turns a chance encounter into humanity’s first war with the alien empire. With an internal rebellion already straining human resources, Marines and local militia must defend the colony, while Avery Johnson emerges as a key soldier.

In the early Human-Covenant War, the UNSC’s Cole Protocol requires dangerous navigation data to be erased before it exposes Earth. Lieutenant Jacob Keyes, Gray Team, refugees in the asteroid settlement called the Rubble, and Covenant rivals are drawn into a struggle around Hesiod.

This Halo anthology gathers short fiction from across the universe, including Karen Traviss's story Human Weakness. It's a good pick if you want different angles on Cortana, the Covenant, Spartans, and the war.

Set a hundred millennia before the main Halo era, young Forerunner Bornstellar awakens the long-sleeping Didact and becomes his student. Their travels through a powerful but troubled civilization lead toward a showdown with the Didact’s rival, the Master Builder.

In the uneasy aftermath of the Covenant War, ONI assembles the covert Kilo-Five team to fuel conflict among the divided Sangheili. As the group searches for Catherine Halsey and the secrets of Onyx, old loyalties and grievances threaten humanity’s fragile peace.

After the Covenant War, a new black-ops team is sent to shape the peace from the shadows. While Halsey faces reckoning on Onyx, Kilo-Five and Spartan Naomi-010 step into a Halo story built on politics, guilt, and unfinished war.

After the apparent collapse of the Forerunner empire, humans Chakas and Riser are stranded on an inverted world and used as pawns in an ancient struggle. With unlikely companions, Chakas crosses a damaged Halo ring in search of home, answers, and escape.

Kilo-Five continues ONI’s covert effort to keep the Sangheili from regrouping after the Covenant War. A mission to extract one of its own from a Sangheili civil war collides with renewed colonial terrorism and a captive alien’s plans for revenge.

Humanity is officially at peace, but Kilo-Five is still fighting in the shadows as Sangheili politics begin to boil over. Naomi, BB, and the team are drawn into a covert campaign where every alliance feels temporary.

As the Forerunner empire collapses, the Flood spreads with devastating force and internal division cripples resistance. The Ur-Didact and the Librarian uncover terrible connections among the Precursors, humanity, and the parasite, then face incompatible choices for saving the galaxy.

This Halo novel turns to the Covenant itself, tracing the uneasy alliance between Prophets and Elites from its founding to the betrayal that eventually tears it apart.

Kilo-Five faces its hardest test when Staffan Sentzke, desperate to learn what happened to his daughter, threatens Earth to force answers from ONI. The team must stop him while confronting the human cost of the SPARTAN-II program and its buried secrets.

As Kilo-Five hunts the last loose ends of a covert war, Naomi-010's long-lost father comes looking for the truth about the Spartan program. It's a personal, angry Halo story about abduction, loyalty, and payback.

Two years after the Master Chief disappeared at the Ark, a scientific discovery with Forerunner ties imperils the galaxy. As human-Sangheili relations remain fragile, a mixed team must put aside old enmities and return covertly to the Ark to uncover the threat.

Special Inspector Veta Lopis investigates a serial killer who may be concealed among the Spartans on Gao. Her case collides with a fight over ancient Forerunner technology, as Insurrectionists and a hostile Covenant remnant threaten to turn the planet’s secrets into crisis.

Military smart AI Iona has only a week left before the UNSC must terminate her to prevent rampancy. Seeking to survive, she brings an unprecedented legal appeal against her own death sentence, attracting the scrutiny of human authorities and hidden interested parties.

Veteran Sangheili commander Rtas ‘Vadum hopes for rest after wars against humanity and the Covenant Prophets. But a surviving Prelate’s vengeance draws him into a trap designed not merely to kill him, but to endanger the future of the entire Sangheili people.

A Deus Ex collection of short fiction set around the fractured world of augmentation politics and corporate conspiracy. It expands the Jensen-era setting with extra angles on fear and control.

Edward Buck looks back on the combat service that he and his ODST squadmates gave during the Covenant War. After the conflict, and amid losses among the Spartans, the UNSC offers Buck a choice that could turn the veteran soldier into part of a new Spartan generation.

Salvager Rion Forge lives by recovering valuable wreckage in the postwar galaxy. When a damaged UNSC cruiser reopens questions about the disappearance of her father and the Spirit of Fire, she and her crew pursue answers that could resolve a long-held personal loss.

On Carrow, human colonists and Sangheili settlers face renewed violence after years of uneasy coexistence. Peace envoy Melody Azikiwe must also free Gray Team from an Elite fleetmaster, while the escalating conflict exposes an ancient danger beneath the planet.

Nine years after surviving the Covenant’s destruction of Paris IV, Molly Patel moves with her scientist adoptive parents to Onyx, where humans and former Covenant species must coexist. When a violent sect enters the shield world, Molly must face a danger tied to the loss she has never escaped.

Following the assassination of Fleet Admiral Graselyn Tuwa and the kidnapping of her family, ONI sends new operative Veta Lopis and a team of Spartan-IIIs to find the culprit. Supported by Blue Team, they uncover a more dangerous plot involving a Covenant splinter faction and Argent Moon.

In the aftermath of the battle on Genesis, Spartan Edward Buck is pursued by the newly rogue AI Cortana. A covert ONI assignment forces him to reunite Alpha-Nine, including a former teammate whose betrayal has left lasting wounds.

Following the events on Genesis, Spartan Edward Buck and his allies flee the now-rogue Cortana. An Office of Naval Intelligence mission compels Buck to reunite Alpha-Nine, forcing the team to confront both a new crisis and an old betrayal.

During the first year of humanity’s war with the Covenant, the Master Chief leads a daring counterattack under Avery Johnson’s guidance. The operation is meant to buy the UNSC time to learn about an enemy whose strengths, motives, and vulnerabilities remain largely unknown.

In 2526, a year into humanity’s war with the Covenant, John-117 leads the Spartans on a counterattack intended to win crucial time for the UNSC. A human insurrectionist coalition sends a sleeper agent to sabotage the operation from within.

Four teenagers on the remote colony world Meridian are stranded above ground when the Covenant attacks their town. Armed with scavenged weapons and aided by an injured Spartan, Saskia, Dorian, Evie, and Victor must survive the siege and uncover why their world was targeted.

Three months after Meridian’s invasion, Evie, Dorian, Saskia, and Victor train under ONI supervision before being sent back to their hometown. Their assignment to monitor a Covenant hunt for a powerful Forerunner artifact becomes a dangerous mission behind enemy lines.

In 2526, with the Covenant War escalating, the Master Chief and Blue Team are sent to seize a disabled Covenant frigate carrying valuable technology. The mission takes them to a hostile, seemingly empty world, where a disgraced fleetmaster’s offer may conceal a deadly trap.

Salvager Rion Forge and the crew of the Ace of Spades find a Forerunner debris field while she continues searching for her missing father. Their discovery draws the attention of ONI and violent Covenant remnants, turning a valuable claim into a far more dangerous expedition.

A year after Cortana’s Guardians impose martial law across much of the galaxy, Blue Team returns to devastated Reach on a covert recovery mission. The Master Chief and his Spartans must reach CASTLE Base before an occupying alien force turns their operation into a wider crisis.

One year after Cortana’s galaxy-wide takeover, the Master Chief and Blue Team return to ruined Reach to retrieve vital assets from Dr. Halsey’s abandoned CASTLE Base. An alien occupying force pursues its own goal there, turning the mission into a crisis.

On the Ark, the Keepers of the One Freedom intend to activate Halo and complete their Great Journey. Embedded among them, ONI operative Veta Lopis and the Spartan-IIIs known as the Ferrets must stop the group before its plan becomes a galaxy-wide catastrophe.

With ONI closing in, Rion Forge and the Ace of Spades crew commit themselves to the personal mission of an ancient being they encountered in their travels. Their search unlocks long-hidden truths and threats that could reshape what they understand about the galaxy.

After the UNSC Infinity is devastated in a Banished ambush, stranded personnel must survive on the fractured surface of Zeta Halo. Spartans and ordinary soldiers face a relentless enemy while trying to resist its search for a dangerous secret hidden on the ring.

In 2559, Arbiter Thel ’Vadam and Spartan Olympia Vale separately pursue an ancient artifact on Netherop that could help free their peoples from Cortana’s control. Their search is being steered by a hidden player and draws them toward threats they cannot yet see.

After his clash with the Master Chief leaves him stripped of power and memory, the Didact wanders a seemingly endless desert wasteland. A distant blue light begins a journey toward the final fate of one of the Forerunners’ most consequential warriors.

In the aftermath of Halo Infinite, the Master Chief continues fighting on Zeta Halo with his AI companion and pilot Fernando Esparza. While searching for scattered allies, he encounters a traumatized medic whose knowledge may expose deeper mysteries, as a vengeful blademaster closes in.