World of Curiosities Louise Penny

In the 18th installment of the Inspector Gamache series, two young people show up in Three Pines. They were children from Armand's and Beauvoir's first case together. Why have they come? Then a letter is discovered that was written by a stonemason who bricked up a room in an attic at a house in the village. The villagers find the room and open it. In it they discover a world of curiosities. An old enemy is near...