The Edge of life is the best of the three here but the other two weren't that bad either. They are currently free on Amazon and are pretty short. Good for a lunch break fix. I enjoyed his style, I think I'll give one of his longer works a try and see how it goes.
I've become a fan of John F.D. Taff and look forward to reading more from him. i was intrigued by this story but once I got into it I realized I had seen the movie based on the events, An American Haunting with Donald Southerland. That didn't matter though. This book is well told and really nothing like the movie. The way Taff "brings the Witch to life" is what makes the book work. It's basically a fictionalized story based on the actual events of the Bell Witch. It's a pretty quick read and well worth it.