I read a lot of books about the paranormal, trying to always learn more and get different people's understandings. I recently finished "GHOSTS ON FILM" by Troy Taylor. Troy has written a number of other paranormal books (which I haven't read yet).
I found this book to be helpful, especially in terms of defining orbs and explaining how photography works in reference to the supernatural. The first section of the book went into a detailed history of photography to give an understanding of how it works. I started getting lost in the details there, however, and skimmed through the book until I got to the chapters on photographing entities.
Troy did provide extensive research on how early photographers tried to scam people with trick photographs of supposed entities. He also provided early photos that were scammed.
He also brings up Sir Arthur Conan Doyle, author of the great Sherlock Holmes novels and a supporter of mediumship. I didn't know that!In short, I found this book educational and interesting, and would recommend it to any ghost hunter!
BOOK SUMMARY FROM THE PUBLISHER: Author and ghost researcher Troy Taylor once again delves into the supernatural with a guide to the history and mystery of spirit photography. In this latest installment in the popular “Haunted Field Guide” series, the author takes an in-depth look at the controversial and mysterious history of spirit photography, including a look at the mediums and scientists who pioneered the field and the most famous pictures that allege to be ghosts captured on film.