Ann Leckie’s Imperial Radch series concludes with Ancillary Mercy. A person is discovered in the Undergarden who should not exist, who may represent a ship that has been hiding from Anaander Mianaai for centuries. But just as new information begins to provide the pieces of the puzzle, forces arrive in the outskirts of the system, and they don’t appear friendly.
After sleeping for a hundred years, lost in his survival pod after a fleet engagement, John Geary is awakened to a world in which the war has dragged on too long, killing senior officers faster than they could impart their knowledge to the next generation. Trapped in a fleet far behind enemy lines, surrounded by ship captains who never learned the tactics and battle strategies he was trained with, and with the position of fleet admiral thrust upon him, can he make the difference between the seemingly inevitable destruction of the fleet, and a return to Alliance space?