The Cruelest Month by Louise Penny

Welcome to Three Pines, where the cruellest month is about to deliver on its threat. It’s spring in the tiny, forgotten village; buds are on the trees and the first flowers are struggling through the newly thawed earth. But not everything is meant to return to life. When some villagers decide to celebrate Easter with a séance at the Old Hadley House, they are hoping to rid the town of its evil—until one of their party dies of fright. Was this a natural death, or was the victim somehow helped along?