Halo: Envoy

Halo: Envoy is a novel set in the Halo universe by Tobias S. Buckell. It was released on April 25, 2017. The Halo: Fractures short story Oasis, also written by Buckell, served as a quasi-prequel to Envoy, introducing the novel's central setting and conflict.

Plot synopsis
Melody is dispatched as an envoy to the Sangheili Fleetmaster Rojka Kasaan who is a commander in the Joint Occupation Zone of planet Carrow. She comes to find that the ship master is in possession of the Spartans known as Gray Team. He had collected them (in secret) after the destruction of Glyke due to Operation: SUNSPEAR. Due to an uprising led by Thars, who opposes peace with humans, Rojka is distracted and Melody is able to sneak off to the storage room Gray Team is being held in. She manages to thaw the three Spartans from cryo sleep just before being rendered unconscious from wounds inflicted by Rojkas' guards.

Melody awakes to find herself in the presence of the infamous Gray Team. She realizes that Gray Team is somewhat in the dark about their current whereabouts and situation. They come to find that the Human-Covenant War has been over for more than six years and that they have been in cryo the whole time as prisoners to Rojka. Gray Team discovers they have left a dire situation stranded in space only to be brought back right in the middle of the fray of a new and desperate situation. They learn of the new JOZs and that humans and Sangheili are residence of the planet they are now seemingly stranded on.

Struggling to come to terms with their past actions concerning the activating of the NOVA Bomb, Gray Team now tussles among themselves as they try to grapple the reality of their new situation. While continuously being pursued by the vengeful Rojka, who in turn is also dealing with Thars's forces, Gray Team and Melody start trying to find their way through the Carrie desert toward a rendezvous previously set up with Melody. Gray Team and Melody finally make it to the pre-scheduled meeting location only to find an underground ONI facility buried in the mountains. They narrowly gain access to the base just before being destroyed by Thars and his followers. Soon Thars blasts his way into the base and forces Gray Team on the move again. At the same time, Rojka overhears the envoy attempt to warn Thars of a Jiralhanae chieftain's plot to destroy Carrow and rescues her to learn more about why the Jiralhanae arrived planetside. Despite his anger, he prioritizes the safety of his home over vengeance on Gray Team.

Out of the base and back out in the sand Gray Team and Melody make their way to the nearby human settlement which is currently in a battle. Once in town they discover there is more danger besides Thars. The Jiralhanae chieftain, Hekabe, supposedly under the authority of Thars, decides to set his plan in motion. He ignores Thars's orders and brings his ship and army to the surface of Carrow and begins his plot.

Gray Team and the local human government realize that Hekabe has started digging in the desert so they put plans in action to intercept him, shooting down his cruiser in the process. They team up with Rojka and his remaining forces to combat the new threat. Their plan to thwart Hekabe finds much resistance as the Jiralhanae continue burrowing deep into Carrow toward an ancient and forgotten terror, the mythical Sharquoi. Upon discovering his goal to try and control the Sharquoi, Melody, Gray Team, Rojka, and the human government enact a daring mission to intercept Hekabe. Their mission takes them to the edge of despair as they close in on Hekabe and find that they're too late. Hekabe, with the help of an ancient artifact known as the vertex, is able to control the mythical monsters and pit them against the humans. Aware of the danger Hekabe poses should he find a slipspace-capable ship, Rojka attempts in vain to convince Thars to scuttle his remaining destroyers, only for the Sharquoi to hijack the destroyers; Thars is subsequently executed by Rojka for endangering everyone. Gray Team and company challenge the enraged Jiralhanae and his thousands of Sharquoi in the depths of the Forerunner structure under the desert sand. They narrowly escape the destruction of the structure after the human governor gains control of the vertex, who summons the Sharquoi back to the Forerunner structure while also destroying the hijacked ships, sacrificing herself by burying them with a nuke.

Gray Team and Melody are taken back into UNSC custody once reinforcements are able to access the planet. Back at his keep, Rojka is stripped of his title as kaidon due to having lost all combat-worthy ships but is offered to be the Sangheili envoy to the humans due to his relatively extensive experience with them. Rojka accepts the position, recognizing he can bring about peace for both races. Melody is congratulated for securing Gray Team and acting as envoy and is then sent to be debriefed by ONI. Gray Team are debriefed and caught up on the six years they were in cryo. They learn that Operation SUNSPEAR was actually conducted after the peace treaty with the Sangheili and that the Covenant has been dismantled officially. Gray Team is then given a choice whether they want to be discharged from the UNSC or be put back into operation. They choose to stay active at the behest of a few requests, which CINCONI, Admiral Serin Osman and a fellow Spartan-II, quickly agrees to.

Appearances
{{Featurelist|secondcolumn=title-5|title-1=Characters|

Human

 * Adam Hsein
 * Adriana-111
 * Aru
 * Brandon Rhodes
 * Cameron
 * Dizzy
 * Dunkirk
 * Ellis Gass
 * Franklin Mendez
 * Grace
 * Greg van Eekhout
 * Ivrin Yarick
 * Jai-006
 * Jeff Gass
 * Jens Forsburg
 * John-117
 * Kait Adelie
 * Kapoor
 * Lamar Edwards
 * Melody Azikiwe
 * Michael-120
 * Rae Carson
 * Robert Watts
 * Senj
 * Serin Osman
 * Travis Pope
 * Victoria Weaver
 * Wyse

Jiralhanae

 * Anexus
 * Atriox
 * Hekabe
 * Kritus
 * Odanostos
 * Remarus
 * Terrillus
 * Vikus

Sangheili
}}
 * Akato 'Dakaj
 * Daga 'Rathum
 * Keza
 * Khoto 'Gaaran
 * Mrata
 * Rojka 'Kasaan
 * Thars 'Sarov
 * Thel 'Vadam
 * title-2=Species|
 * Degaeorth
 * Flood
 * Forerunner
 * Human
 * Jiralhanae
 * Kig-Yar
 * Lekgolo
 * Mgalekgolo
 * Nishum
 * Sangheili
 * San'Shyuum
 * Sharquoi
 * Thorn beast
 * Unggoy
 * title-3=Organizations|
 * Banished
 * Covenant
 * Covenant military
 * Covenant fleet
 * Covenant Honor Guard
 * Covenant remnants
 * Zealots
 * New Colonial Alliance
 * Rh'tol
 * Sapien Sunrise
 * Surakan Militia Volunteers
 * Militia Volunteer Command-and-Control
 * Surakan Stock Exchange
 * Swords of Sanghelios
 * Unified Earth Government
 * UEG Diplomatic Corps
 * United Nations Space Command
 * UNSC Armed Forces
 * UNSC Marine Corps
 * Orbital Drop Shock Troopers
 * UNSC Navy
 * Naval Special Weapons
 * SPARTAN-II program
 * Gray Team
 * Office of Naval Intelligence
 * Vheiloth
 * Voice of Maardoth
 * title-4=Locations|
 * Intergalactic space
 * Installation 00
 * Milky Way
 * 23 Librae system
 * The Rubble
 * Epsilon Eridani system
 * Reach
 * Glyke
 * 'Kasaan Keep
 * High Charity
 * Joint Occupation Zone
 * Carrow
 * Kiriken
 * Uldt Desert
 * Arduu Ridge
 * Aza Oasis
 * Herndon Lake
 * Suraka
 * Finlay Ice Creams
 * Rughet Factories
 * Sector 24
 * Sector 31
 * Wulandari Building
 * Sharquoi hive
 * Carstolum River
 * Fallen Tree
 * Karfu Mountains
 * Gila Station
 * Masov Oasis
 * Astlehich River
 * Rak
 * Sandholm
 * Oban
 * Oth Sonin system
 * Doisac
 * Warial
 * Procyon system
 * Arcadia
 * Soell system
 * Threshold
 * Installation 04
 * Sol system
 * Earth
 * East African Protectorate
 * Kenya
 * New Mombasa
 * Luna
 * Mars
 * Lake Komeno
 * Terra Cimmeria
 * Valles Marineris
 * Tenderloin District
 * Urs system
 * Sanghelios
 * Zeta Doradus system
 * Onyx
 * Sarcophagus
 * title-5=Events|
 * Blooding Years
 * First Immolation
 * Great Schism
 * Human-Covenant War
 * Fall of Reach
 * Battle for Earth
 * Battle of Mombasa
 * Battle of Installation 00
 * Battle of Installation 04
 * Battle of Installation 05
 * Changing of the Guard
 * Operation: SUNSPEAR
 * Insurrection
 * Post-Covenant War conflicts/Sangheili-Jiralhanae war
 * Operation: POLECAT
 * Carrow Conflict
 * Operation: BUZZHAWK
 * Battle of the Sharquoi Hive
 * title-6=Weapons|
 * BR55 battle rifle
 * Class-1 directed energy cannon
 * Energy projector
 * HAVOK tactical nuclear weapon
 * M19 surface-to-surface missile
 * M39 rocket turret
 * M392 DMR
 * M68 Gauss cannon
 * MA37 assault rifle
 * Magnetic Accelerator Cannon
 * NOVA bomb
 * Point-defense gun
 * SRS99-S5 AM sniper rifle
 * Type-1 energy sword
 * Type-2 gravity hammer
 * Oath of Fury
 * Type-25 plasma pistol
 * Paegaas Workshop Spiker
 * M41 Vulcan
 * title-7=Vehicles|
 * AV-22 Sparrowhawk
 * Class-5 Bumblebee
 * Whiskey Tango Foxtrot One
 * Covenant corvette
 * Covenant frigate
 * Pure Resolve
 * Reprisal's Fire
 * Retribution's Promise
 * Vengeful Deed
 * Fighter's Blood
 * Hammerstrike
 * D77-TC Pelican
 * EV-44 Nightingale
 * F-99 Wombat
 * Qavardu Workshop Gravemaker
 * M12 Warthog
 * M12 Chaingun Warthog
 * M12G1 Gauss Warthog
 * M121 Jackrabbit
 * M313 Elephant
 * M400 Kodiak
 * Eklon'Dal Workshop Marauder
 * Foebane
 * ''Unwavering Discipline
 * Phantom
 * Prowler
 * Ren
 * Scarab
 * Seraph
 * Type-26 Banshee
 * Type-32 Ghost
 * Qavardu Workshop Prowler
 * UNSC frigate
 * title-8=Technology|
 * Active camouflage
 * Automated surgery suite
 * Biofoam
 * Cryonics
 * Cryo chamber
 * Data pad
 * Energy shielding
 * Energy barrier
 * Kig-Yar point defense gauntlet
 * Halo Array
 * Heads-up display
 * Helmet recorder
 * Holography
 * Holotank
 * Impulse drive
 * Jetpack
 * Jump pack
 * Series 8 jetpack
 * Jiralhanae power armor
 * Malakost tracker
 * MJOLNIR Powered Assault Armor
 * MJOLNIR [GEN1]
 * Mark V
 * MJOLNIR [GEN2]
 * Nanotechnology
 * Neural interface
 * ODST armor
 * Sangheili harness
 * Sangheili combat harness
 * Shaw-Fujikawa Translight Engine
 * Stasis field
 * Thermal blanket
 * Vertex
 * Series 8 jetpack
 * Jiralhanae power armor
 * Malakost tracker
 * MJOLNIR Powered Assault Armor
 * MJOLNIR [GEN1]
 * Mark V
 * MJOLNIR [GEN2]
 * Nanotechnology
 * Neural interface
 * ODST armor
 * Sangheili harness
 * Sangheili combat harness
 * Shaw-Fujikawa Translight Engine
 * Stasis field
 * Thermal blanket
 * Vertex

Production notes

 * The novel's cover is illustrated by concept artist Chase Toole, who also designed the cover of Halo: Saint's Testimony and provided artwork for Halo Mythos. The novel includes a map, drawn and annotated by Sarah Campbell, which shows several key locations shown in the novel.
 * The novel has several inconsistences with the number of enemy ships involved in the Carrow Conflict: when the Jiralhanae fleet is first mentioned, they are stated to have two s and two s. Shortly afterwards, the Foebane, one of the cruisers, departed for the planet's surface. After Thars 'Sarov confronted Hekabe and Hekabe ordered his ships to turn on Thars', two Jiralhanae cruisers were stated to be attacking despite the fact that there was only one cruiser left in orbit while Foebane dug up the Sharquoi hive. After the battle, Anexus states that they lost two of their ships, but while the third is presumably destroyed as well, it is never mentioned again nor is it seen being destroyed despite Foebane being stated to be the last Jiralhanae ship left at that point.
 * On page 192, Governor Ellis Gass is told that the two Covenant frigates in orbit have retreated rather than face her merchant ships in the opening stages of Operation: BUZZHAWK. However, the two frigates are stated to be Jiralhanae frigates when previously up until that point they were identified as belonging to Thars and were thus Sangheili ships. Presumably, this was a simple error on the part of the author, particularly as this is the only time they are called Jiralhanae ships.