A man is shot at in a juvenile reform home – but someone else dies… Miss Marple senses danger when she visits a friend living in a Victorian mansion which doubles as a rehabilitation centre for delinquents. Her fears are confirmed when a youth fires a revolver at the administrator, Lewis Serrocold. Neither is injured. But a mysterious visitor, Mr Gulbrandsen, is less fortunate – shot dead simultaneously in another part of the building. Pure coincidence? Miss Marple thinks not, and vows to discover the real reason for Mr Gulbrandsen’s visit. Librarian's note: this entry is for the novel, "They Do It with Mirrors." Collections and other Miss Marple stories are located elsewhere on Goodreads. The series includes 12 novels and 20 short stories. Entries for the short stories can be found by searching Goodreads for: "a Miss Marple Short Story."