I apologize that this has taken so long, but after editing and communicating with my publisher, White Crow Books, it looks as though the Bangs Sisters book will be out this Summer. I have relied on rare, source material, as much as I could find, and have presented what I believe is a fair and balanced look at these wonder workers. They were endlessly assailed by the critics and medium haters of the day because their work, primarily spirit precipitated portraits, were a target for magicians who were determined to duplicate their work. But, like so many of these conjuring types, they could never, ever duplicate the phenomena under the same, exact conditions.
I am currently about 40,000 words into the next book I am editing, writing and researching, The Davenport Brothers, the World Renowned Spiritual Mediums.