In this sixth of Louise Penny’s Chief Inspector Gamache mysteries, she adroitly keeps three plots up in the air like an expert juggler. The first is left over from the previous book which was set in the magical village of Three Pines near the Vermont border. The second is in Quebec City during a winter festival, where an archeologist obsessed with finding Quebec’s founder Samuel Champlain’s final resting place is murdered in the basement of an English language library. The third is set in the same area, but back in the mid-1800s. As if this wasn’t enough, in a fourth plot, we gradually learn what has happened to the Chief Inspector and his assistant, Jean Guy Beauvoir, since we last encountered them that has left both physically and mentally wounded. A tour de force. 371 pp.