Joe Gunther is a police detective in Vermont. The plot concerns an old murder conviction, and a vengeful figure in a ski mask who seems intent on having the case reviewed. This is a long-running series, but this is the first book in the sequence, so is an excellent introduction to the main characters.
The plot is well managed, and a series of intersecting story strands are dealt with cleverly, and brought to a satisfying conclusion. Mayor writes well, and has an ear for a good phrase. I was surprised that one of the US reviewers thought his characters were weak - I found them convincing.
I enjoyed this book. It's not breaking new ground in detective fiction, but it's well written, well edited and a good introduction of an excellent series.