Sad Wind from the Sea Book

This book reads like a series and makes you want to yearn for more Mark Hagan adventures. A former naval officer who has fought for the British and then his native American Navy, Hagan is now located at Macao and running arms. When he accidentally stumbles onto information that a quarter million dollars in gold is sunk aboard a boat in a marsh inside Red China waters he makes plans to salvage the gold from under the nose of others who want it and betray the girl who knows the location of the treasure that was destined to be delivered to a charity. Good story, but a battle from the start to the finish to protect the girl and the treasure.