The Killing Depths
by Martin Roy Hill
America's first attack submarine crewed by both men and women stalks a renegade Iranian sub. But another predator hides aboard the American sub, a murderer who has already left a trail of dead women behind on shore. While the two subs battle each other, NCIS agent Linus Schag must discover the murderer's identity before the killer's blood lust leads to the death of all onboard.