A Great Reckoning

Armand Gamache comes out of retirement to take command of the Sûreté du Québec training academy, an institution rotten enough that its graduates have poisoned the force for a generation. He keeps the worst of the old guard on staff, including Professor Serge Leduc, because he intends to watch them.

When Leduc is found shot dead in his rooms, four cadets are implicated — and each of them, along with Gamache himself, was given a copy of a strange old map of Three Pines. Gamache, who put the map into their hands, is now a suspect in a murder he is expected to solve.

A Great Reckoning is the twelfth Chief Inspector Gamache novel. It follows the map back into the First World War and forward into the question the academy poses: whether a young person handed power can be taught to be decent, and what it costs the teacher to find out.