Nightshade — Iris Foster

Nightmare town. The distance from New York City to the village of Westwood was perhaps a hundred miles, but Jennifer Crane felt that she was entering an entirely different world when she came home after her year in the metropolis. New York had been exciting and fun, but Jenny was looking for something more substantial: for a love that could last the rest of her life. And she thought that she had found that love in Derek Baines, successful young Westwood man. Then Derek was shot, murdered, and Jenny was plunged into a nightmare where hatred seemed to be destroying everything she had ever known, ever loved. The evil touched even into her own family, until there was no one she could trust, nothing that could save her from plunging into madness and no one to tell her why!