The Covenant has collapsed after a long, brutal war that saw billions slaughtered on Earth and her colonies. For the first time in decades, however, peace finally seems possible. Yet, the war is far from over: it's just gone underground. The UNSC's feared and secretive Office of Naval Intelligence recruits Kilo-Five, a team of ODSTs, a Spartan, and a diabolical AI to accelerate the Sangheili insurrection. Meanwhile, the Arbiter, the defector turned leader of a broken Covenant, struggles to stave off civil war among his divided people.
Across the galaxy, a woman thought to have died on Reach is actually very much alive. Chief scientist Dr. Catherine Halsey broke every law in the book to create the Spartans, and now she's broken some more to save them. Marooned with Chief Mendez and a Spartan team in a Forerunner slipspace bubble hidden in the destroyed planet Onyx, she finds that the shield world has been guarding an ancient secret - a treasure trove of Forerunner technology that will change everything for the UNSC and mankind.
As Kilo-Five joins the hunt for Halsey, humanity's violent past begins to catch up with all of them as disgruntled colony Venezia has been biding its time to strike at Earth, and its most dangerous terrorist has an old, painful link with both Halsey and Kilo-Five that will test everyone's loyalty to the limit.
Karen Traviss is the #1 New York Times bestselling author of three Star Wars: Republic Commando novels: Hard Contact, Triple Zero, and True Colors; three Star Wars: Legacy of the Force novels: Bloodlines, Revelation, and Sacrifice; as well as City of Pearl, Crossing the Line, The World Before, Matriarch, Ally, and Judge. A former defense correspondent and TV and newspaper journalist, Traviss has also worked as a police press officer, an advertising copywriter, and a journalism lecturer. Her short stories have appeared in Asimov's, Realms of Fantasy, On Spec, and Star Wars Insider. She lives in Devizes, England.