The 26th century. Once considered clandestine, the Spartan-II program has now gone public. Tales of armored supersoldiers fending off thousands of Covenant attacks have become the stuff of legend. While the Master Chief defends a besieged Earth and the myriad factions of the Covenant continue their crusade to eliminate humanity, an ultra-secret cell of the Office of Naval Intelligence known as “Section Three” devises a plan to buy the UNSC vital time. It will need hundreds of willing soldiers, though - and one more Spartan - to get the job done. 

Just hours following their climactic battle on the Forerunner planet Genesis, the Spartans of Blue Team and Fireteam Osiris find themselves running for their lives from the malevolent machinations of the now-renegade artificial intelligence Cortana. But even as they attempt to stay one step ahead, trouble seems to find Spartan Edward Buck no matter where he turns.

December 2559. Humanity has its back against the wall after the United Nations Space Command flagship Infinity drops out of slipspace into a devastating ambush launched by the Banished. As this fierce enemy alliance seeks to claim a mysterious object hidden within the ancient Forerunner construct known as Zeta Halo, the surviving UNSC corps finds itself compromised and its leadership out of reach—with remaining personnel forced to abandon ship and take their chances on the fractured, unpredictable surface of the Halo ring.

It's 2552. Having barely escaped the final battle for Reach against the vast alien alliance known as the Covenant, the crew of the Pillar of Autumn, including Spartan John-117 - the Master Chief - and his AI companion Cortana, is forced to make a desperate escape into slipspace. But their destination brings them to an ancient mystery and an even greater struggle. 

The 26th century. Humanity has expanded beyond Earth’s system to hundreds of planets that colonists now call home. But the United Earth Government and the United Nations Space Command is struggling to control this vast empire. After exhausting all strategies to keep seething colonial insurrections from exploding into a full-blown interplanetary civil war, the UNSC has one last hope.    

Molly Patel was only seven years old when the alien alliance known as the Covenant destroyed her homeworld and killed her family. As one of the few to escape the glassing of Paris IV, and despite the United Nations Space Command winning the war on behalf of humanity, Molly never forgot how much she had lost. Nine years later, when her adoptive parents - research scientists specializing in ancient Forerunner technology - are called to the mysterious and wondrous place known as Onyx, Molly vehemently objects.

An original full-length novel set in the Halo universe and based on the New York Times best-selling video game series! The new Halo novel from acclaimed writer Kelly Gay, author of the thrilling novella Halo: Smoke and Shadow. 

October 2559. With the galaxy in the suffocating grip of a renegade artificial intelligence, another perilous threat has quietly emerged in the shadows: The Keepers of the One Freedom, a fanatical and merciless Covenant splinter group, has made its way beyond the borders of the galaxy to an ancient Forerunner installation known as the Ark. Led by an infamous Brute named Castor, the Keepers intend to achieve what the Covenant, in all its might, failed to: Activate Halo and take the last steps on the path of the Great Journey into transcendence.

Launch once more into galaxy-spanning conflict and legendary heroism, shards of an ever-expanding journey where human and alien alike find their finest hours in facing their greatest challenges. These scattered stories span untold millennia, from the age of the ancient custodial race known as the Forerunners to the aftermath of the Covenant's bloody war against humanity and even the shocking events surrounding the resurrection of the mysterious Guardians.

It's 2552. The theocratic military alliance known as the Covenant is showing no mercy as it continues to assault every human world it encounters, but in the way lies humanity’s greatest champion, the supersoldier Spartan John-117 - the Master Chief. Together with his AI companion Cortana and the last remaining Spartans, the galaxy-spanning fight rages on two fronts following the destruction of the human military stronghold Reach by Covenant forces and the mysterious artificial ringworld known as “Halo” at the hands of the Master Chief.