Death of a Smuggler — M.C. Beaton

A murder, a missing man, and his newest constable's secret past are all that's standing in the way of Sergeant Hamish Macbeth settling in for a relaxing winter in his sleepy Scottish village of Lochudch.

All Hamish Macbeth ever really wants is a quiet life in the peaceful surroundings of his home in the Highland village of Lochdubh. Unfortunately for him, the time he would normally find most relaxing, after the tourists have gone and before the winter sets in, turns out to be far from peaceful.
 
The new love in his life, Claire, is keen for them to take a holiday and Hamish is mulling over the idea when his newly-assigned constable arrives, presenting Hamish with both a surprise and a secret. Getting to the bottom of the secret becomes the least of Hamish's problems when, at the opening of the revamped village pub, he meets a family who have a score to settle with a sinister man who has mysteriously gone missing. Discovering a murdered woman's body puts further pressure on Hamish, especially when it becomes clear that the murdered woman and the missing man were linked, although their true identities become yet another mystery.
 
To Hamish's horror, he then finds himself working on the murder case with the despicable Detective Chief Inspector Blair, his sworn enemy, who has been drafted in under curious circumstances. With a growing list of suspects, ever more bewildering circumstances and Blair hindering him at every turn, Hamish must find the murderer before anyone else falls victim.
 
Never has a quiet life seemed further from his grasp!