Mignon G Eberhart

"When Nurse Keate arrives at the Thatcher estate to care for a man with a bullet in his shoulder, she's told that he shot himself accidentally--but when the convalescing man is murdered soon thereafter, it becomes clear that the only "accident" was his not being fully killed the first time around. A murderer stalks the manor and yet the rest of the family isn't the slightest bit alarmed; instead, they seem intent on concealing the crime and adding...