1971 2 vols 192pp & 192pp SECS Press paperback. Illustrated with black & white and 16pp colour photographs. Small dent to bottom of volume 1, with mild water (bodily fluid?) stain, not affecting text. Mild rubbing to covers else VG.
 
"An analysis of sexual rituals and customs as employed by Satanists and witches in their worship of the Devil." Illustrated with plenty of explicit black & white and colour photographs, mostly indicating that fellatio is the Devil's preferred method of worship...
 
Often cited as actually being written by legendary film-maker Ed. D. Wood Jr. it is more likely that Wood just provided the photo captions with the text being done by Leo Eaton. Scarce.