They do it with mirrors

SUMMARY: When Jane goes to stay with her friend Carrie-Louise at her home she soon begins to realise that all is not well there. Not only is this the family home but it is also a rehabilitation centre for delinquent boys and there are definitely some odd characters living there. Then an attempt is made on the life of Carrie-Louise’s husband, her step-son is murdered and someone tries to poison Carrie-Louise.... E-book exclusive extras:1) Christie biographer Charles Osborne's essay on They Do It with Mirrors;2) "The Marples": the complete guide to all the cases of crime literature's foremost female detective.A sense of danger pervades the rambling Victorian mansion in which Jane Marple’s friend Carrie Louise lives—and not only because the building doubles as a rehabilitation centre for criminal youths. One inmate attempts, and fails, to shoot dead the administrator. But simultaneously, in another part of the building, a mysterious visitor is less lucky. Miss Marple must employ all her cunning to solve the riddle of the stranger’s visit, and his murder—while protecting her friend from a similarly dreadful fate.The New York Times: ‘No one on either side of the Atlantic does it better.’ Jane 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 mysterious visitor is found shot dead in another part of the building. Mrs. Van Rydock moved a little back from the mirror and sighed.