They Do It With Mirrors: A Miss Marple Mystery (Miss Marple Mysteries Book 6) by Agatha Christie

They Do It with Mirrors is the sixth book in Agatha Christie’s Miss Marple series. In this novel, Miss Marple is called upon to investigate a series of mysterious events at a rehabilitation center for troubled young people, located at the estate of a wealthy benefactor, Carrie Louise. When one of the residents is found dead under suspicious circumstances, Miss Marple uncovers a web of deceit and danger. As she delves deeper into the lives of those involved, she uncovers hidden motives and unravels the mystery behind the murder.