Read, Sarah The Bone Weaver's Orchard (1950305422)
When Charley follows his pet insects to a pool of blood behind a false wall, he could run and let those stones bury their secrets. He could focus on his studies and wait for his father to send for him. Or he could walk the dark tunnels of the school, scour its abandoned passages, and pick at the scab of a family's legacy of madness and murder.