"The Madness of Crowds" by Louise Penny. Presented by Manville branch staff.
Chief Inspector Gamache finds his holiday with his family interrupted by a simple request. He's asked to provide security for what promises to be a non-event. Then Gamache starts looking into Professor Abigail Robinson and discovers an agenda so repulsive he begs the university to cancel the lecture. When a murder is committed it falls to Armand Gamache, his second-in-command Jean-Guy Beauvoir, and their team to investigate the crime as well as this extraordinary popular delusion"-- Provided by publisher.