The Galaxy is ruled by a single Empire—but the Imperial Throne is empty. The machine races demand a turn at the job, but the organics refuse to allow it. For more than a century, the Galactics have battled for supreme power. War and instability reign in place of peace, with every species spread over a hundred billion stars suffering as the Empire decays. James McGill discovers a scheme is underway. A new power is rising, determined to snatch the Throne from all the rest. Will this unite the Galactic Empire, or destroy it utterly? Find out in THRONE WORLD, the thrilling 21st book of the Undying Mercenaries series. With millions of copies sold, USA Today Bestselling author B. V. Larson is the king of modern military science fiction.