New York Times–Bestselling Author: A captured submarine must be retrieved from the Russians before they can decode its cutting-edge technology . . .   The Royal Navy is testing Sea Leopard, an anti-sonar device that can make its subs virtually undetectable. But before the work can be completed, their nuclear submarine Proteus is targeted and trapped by the Soviet Union—whose military is determined to figure out, and steal, this new technology.   Spymaster Kenneth Aubrey sends SIS agent Patrick Hyde to locate the device’s inventor before the KGB gets to him first. In the meantime, a US Navy officer is on his way to Russia in hopes of fixing Sea Leopard and getting Proteus out of drydock before it’s too late . . .  Praise for Craig Thomas’s thrillers   “Will have you sweating bullets. Thomas misses no tricks, and tension is sustained from first page to last.” —The New York Times Book Review   “High-octane.” —Daily Express