I have an abiding interest in the Outer Hebrides, so it's strange that I haven't come across this trilogy before. The Blackhouse is the first book in the acclaimed Lewis Trilogy, featuring DI Fin Macleod. It's followed by The Lewis Man, and concludes with The Chessmen. He's a quite prolific crime writer, and has written a number of other series, a few standalone novels, and also for television.
Fin is a disillusioned cop in Edinburgh, and he is called back to Lewis where he was born because there has been a murder there which bears a resemblance to an unsolved murder he was working on in Edinburgh. He hasn't been back to Lewis since he left 18 years before, and he reluctantly confronts his past. The plot is cleverly revealed, with plenty of unexpected twists, and the murder does have a connection with his past. This is a superb and moving crime novel, some of the set pieces are quite extraordinary, especially the novel's central event around the islanders annual 'guga' hunt (gannet chicks) on a remote uninhabited rock 40 miles from the north of Lewis.
I'm intending to return to Lewis next year, apparently there is a Lewis Trilogy Walk taking in all the locations in the novel. I'll be doing that, as well as reading the other two novels in the trilogy.