The Dark Garden — Mignon G. Eberhart

MURDER IN THE MIST

For slim, pretty, young Katie Warren, a guest in the mist-wreathed mansion of Mina Petrie, wealthy recluse dying of a secret ailment, death was very close.

When death came, it involved Katie and the two men in her life. And Katie Warren knew then, beyond a show of a doubt, that she was next.