The twenty-sixth 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. At the Office of Naval Intelligence, Dr. Catherine Halsey has been hard at work on a top-secret program that could bring an end to the conflict...and it starts with seventy-five children, among them a six-year-old boy named John. And Halsey could never guess that this child will eventually become the final hope against an even greater peril engulfing the galaxy—the inexorable confrontation with a theocratic military alliance of alien races known as the Covenant.