They were Victims of Unreasoning Hatred
From the back:
A Noise In The Dead Man’s Room
Mike Shayne lunged at the locked door. Brute strength sent him crashing into the room… and into a woman, a metal strongbox in her hands.
As Shayne put his hand over her mouth to muffle the screams, he was aware of her soft, warm flesh. He had a feeling that this was a lot of woman. And that she would do a lot for a man — alive or dead.
An Oklahoma marshal matches wits and six-shooters with a gang og river pirates — and gives them some lessons in quick thinking and fast shooting
Not related to Lord of the Storm
The book that created Cathy — the most evil woman in fiction
… More deadly than the male