Mary Roberts Rinehart 
Haunted Lady 

A very very rich dowager is being scared to death . . .A classic whodunit by a #1 bestselling author who ’helped the mystery series grow up" (New York Times)First a cloud of bats; then rats – it looks like someone is trying to frighten Eliza Fairbanks into her grave. At least that’s what the elderly widow claims is being done to her. Nurse Hilda Adams, aka "Miss Pinkerton" to the Homicide Bureau, believes Eliza’s fears could just be true . . .And when a dubious assortment of relatives come visiting Eliza at the mansion, it’s Hilda’s job to keep an eye on Eliza before a potential killer resorts to more definitive means. And considering all the bad blood running through the heart of the Fairbanks family, it might already be too late to save her charge.