This series reads like a bit of a travelogue, which I have enjoyed, but there are downsides to this as well. The author makes you feel the wind blowing the sea spray onto your face, he makes you salivate at the thought of lobster ragu, or one of the mouth-watering dishes mentioned, and finally, he makes you want to visit these places. That's the good bit, but his inspectors have the "job" of delivering the local history and points of interest, before Commissaire Dupin gives them their instructions, and they reply "yes boss", "on it, boss". The book doesn't really make it as a thriller because of this slowing of the pace. I have marked the book down because there is a little too much of the repetitive dialogue and potted history. By the end of the book I was starting to skim.
Dupin himself is not particularly likeable. I have no idea how his poor, overworked subordinates can finish all the work he dumps on them. He's not very healthy, either, gulping down multiple coffees per day, which he orders two or three at a time. He has no hesitation in making various business people wait around at his beck and call until he deigns to interview them. No wonder they resist helping him. Connard!
The author does a good job of highlighting problems in the fishing industry, such as over-fishing, wasteful methods, and criminal activity. Clearly though, the cops are pretty ineffective at dealing with any of this.
In some of the books in this series, there have been snippets of French, but in this one, all the snippets are in some dialect of Bretagne, and therefore of little use to me.
I still recommend this book or any of this series, but am rating it 3.4.