A propulsive, mind-expanding thriller-and the world-shaking conclusion to the Course of Empire trilogy-about bold scientific dreams turning into nightmares … or perhaps new beginnings …

After usurping control of the world's most powerful military technology, General Chip Walden knows the endgame is near and tasks scientist Eric Hill with one final assignment. Helped by the love of his life, Jane Hunter, Hill is haunted by premonitions of a coming catastrophe as the technology he created takes on a life of its own.

As Hill attempts to avert disaster, FBI Special Agent Bud Brown seeks revenge for the murder of his fellow agents by eco-terrorist Riona Finley. But what no one realizes is that forces are at work that have already decided humanity's fate. With the clock ticking toward an irrevocable apocalypse, it's no longer a question of if the world can be saved, but who will be the chosen few that survive.

The Great Unmaking is the grand conclusion to Brian Nelson's magisterial trilogy that James Rollins has called "a must-read adventure."