Martin Ebon was a member of the Parapsychology Foundation for twelve years & edited the magazines, Tomorrow & International Journal of Parapsychology. He was also editor of Spiritual Frontiers. The Devil's Bride offers a wealth of documentation gathered from different historical periods, geographical locales & cultures.
An interesting read; however, it is quite dated. It's pretty dry stuff, even with some of the horrific treatments described for those being 'possessed'.
It's clear that many of these situations were severe mental health issues brought on by the very religious institutions that were supposedly exorcising 'demons'.
The only reason to read this is to capture the moment in time in which it was written. Many of the concepts have now been disproven or debunked.