(Very mild spoilers - opinion of a character, rather than plot.)
Thoroughly enjoyable "whodunnit". More insight into the characters - both the police and others - than many of the genre, with some interesting red herrings and back stories, which are carried through rather than being discarded once their usefulness to the plot is over. I love Inspector Gamache; I love Three Pines and its inhabitants. I initially felt for young Yvette Nichol, but by the end of the book found her thoroughly irritating and wanted to shake her. I guessed the perpetrator, but not the motive.
Looking forward to reading more of these.