The following blog post was written by Father Ashcraft, a sedevacantist Byzantine Catholic priest and an independent author addressing topics in the realm of the Paranormal, Historical and Religious Mysteries, Cults, The Occult, Exorcism, Demonology, and Eschatology. He has been called "the Malachi Martin of the 21st century". Not content to offer the same answers that so many others have, Fr. Ashcraft is not afraid to step outside the box of accepted theological or historical opinion to draw upon alternative sources of information that not only shed light on the mysteries that surround us, but offer real, tangible answers on a material and spiritual level.
He has written an article about another demonologist, Chris Fleming. Here's the article:
http://www.trueexorcist.com/2014/02/the-absurd-world-of-demonology.html