Halfhyde and the Guns of Arrest — Philip McCutchan

Royal Navy Lieutenant St. Vincent Halfhyde is once again dispatched to Africa. This time, his mission is to help capture a British traitor who carries secret blueprints of British warships. Assisted by a Scotland Yard detective and a handful of sailors, Halfhyde must outwit the clever Germans, who are determined to take the traitor and his secrets back to the Fatherland.