The Circular Staircase (Miss Cornelia Van Gorder Trilogy #2)

Rachel Innes, a middle-aged spinster, has barely settled in at the country house she has rented for the summer when a series of bizarre and violent events threaten to perturb her normally unflappable nature. A strange figure appears briefly in the twilight outside a window. At night, a rattling, metallic sound reverberates through dark halls, and — most disconcerting of all — the body of a strange man is found lying in a pool of blood at the bottom of a circular staircase. Before this spine-tingling tales ends, five connected deaths shatter the normally placid atmosphere of the vacation retreat. Rachel's devoted niece and nephew are among the prime suspects in one of the murders; stolen securities and a bank default threatens the young pair's financial security; and Aunt "Ray" ultimately fights for her life in an airless secret room.