Rules of Engagement: The Protocol is Enforced

The peace between humanity and the Sangheili was bought with blood, sealed with a political marriage, and defended by a fierce, intimate love.

Ambassador Evan Doucette (an ex-ODST) and Sangheili Captain Relu 'Chavam are bound by an absolute loyalty, yet their union has made them the softest target in a galaxy still simmering with conflict. Their greatest struggle is yet to come, and it will be fought in the heart of their home.

The conflict begins with their son.

Jacob 'Chavam is a human war orphan whose family perished in the conflict. Found on Earth and chosen by Relu at age eight, his adoption cost her everything: estrangement from her powerful father, the Kaidon, who deemed the boy unworthy of the 'Chavam name. Jacob bears the title only by the grace of the Arbiter.

Now fifteen and forged into a disciplined Elite warrior, Jacob returns to the rubble of his birthplace for the first time. He came as a symbol of unity, but finds himself a figure of controversy-a human rejected by his own kind, and a 'Chavam warrior who must prove his worth.

But the political stakes turn lethally personal. When a sudden, desperate plot targets Jacob for capture, the resulting diplomatic crisis threatens to shatter the entire Alliance and the fragile human-Sangheili marriage that holds it together.

Now, hunted across the galaxy, Jacob must reconcile his identity and find his place. Will the "Legacy of Choice" that saved him secure the future, or will the price of his adoption lead to a catastrophic war?