Drug on the Market

A stealthy fishing-boat, blacked-out in the dead of night, and strange blinking lights on the shores of Aberlady Bay add up to a mystery that Lieutenant-Commander Philip Hepburn can''t ignore. Following a chance sighting of the elusive vessel while on shore-leave, and a violent encounter with some shady characters on the desolate salt-marsh, Philip is drawn into investigating the sinister goings...