Dark Moonshine — Jean English

THEY OFFERED HER UNHOLY POWERS

Tana wondered why the wealthy Mrs. Latham wanted a companion when she obviously didn't need one. She was more interested in teaching Tana the secrets of herbs and elixirs -- and in scheming for an arranged marriage between her son Clive and the bewildered girl.

It was then that Tana discovered the family was a matriarchy -- that power was passed from woman to woman, from mother to daughter. But in the Latham's case, they had driven their own daughter mad, and now they needed a replacement…