The Cruellest Month - Louise Penny

Louise Penny is the recipient of the CWA New Blood Dagger for Crime Fiction, the Crime Writers of Canada Arthur Ellis Award for Best First Novel and, in the US, the Anthony Award for Best First Novel and the Agatha Award for Best Novel

The novel takes place at Easter - traditionally a time for death, and for spirits coming back from the dead... Gamache is called to Three Pines when a sance attended by locals goes horrifyingly wrong, and a woman is found on the floor, apparently scared to death. Something frightened Madeleine Favreau so much that it literally stopped her heart, but Gamache knows her killer is from this world, not the next. Meanwhile, Gamache's own enemies high up within the Sret du Quebec are moving in for the kill, and the Inspector waits for the Judas within his own team to strike. But what exactly does the traitor want and, more importantly, how far will they go to ensure Gamache's downfall?