Devil to Pay - C. Northcote Parkinson - Bog

Ranked as a lieutenant despite his undistinguished naval career, Richard Delancey lands a special secret mission, thanks to his command of French. To his chagrin, the mission goes awry. But casting about for fresh opportunity, Delancey becomes involved in customs collection on the Isl of Wight and thwarting the high-stakes activities of smugglers.