Jack du Brul

Summer, 1914. As New England swelters, Detective Isaac Bell is asked to investigate a cache of missing rifles. But whoever broke into this Winchester Factory wasn't just looking to take weapons - they wanted to leave something in the shipping crates .. A radio transmitter, set to summon a fleet of dreaded German U-boats to their location in the seas.

This means only one thing: someone is trying to keep American supplies from reaching British shores. And if Bell doesn't crack the conspiracy in time, the Atlantic Ocean will run red with blood.

With the outcome of the war in the balance and Franklin Roosevelt's orders on the line, Bell must confront an old enemy, and hunt down a new piece of technology that is allowing the Germans to rule the seas from New York to England.

Book 13 in the Isaac Bell series.