The cruelest month : a Chief Inspector Gamache novel / Louise Penny.

Enhanced descriptions from Syndetics:

"Many mystery buffs have credited Louise Penny with the revival of the type of traditional murder mystery made famous by Agatha Christie. . . . The book's title is a metaphor not only for the month of April but also for Gamache's personal and professional challenges---making this the series standout so far."
--Sarah Weinman

Welcome to Three Pines, where the cruelest month is about to deliver on its threat.
     It's spring in the tiny, forgotten villa≥ 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?
     Brilliant, compassionate Chief Inspector Armand Gamache of the Sûreté du Québec is called to investigate, in a case that will force him to face his own ghosts as well as those of a seemingly idyllic town where relationships are far more dangerous than they seem.