Audiobook Emperor's Knife written by Alex Gough. Brothers. Emperors. Deadly enemies. An unputdownable novel of intrigue and combat in Ancient Rome. Emperor Severus is on his deathbed. His sons Geta and Caracalla, feuding in Britannia, are readying for a devastating power struggle. Silus, now a centurion in the Arcani, the secrete network of spies and assassins, is thrown into the maelstrom.