Demonologist

Graymalkin Media

The Demonologist: The Extraordinary Career of Ed and Lorraine Warren (The Paranormal Investigators Featured in the Film "The Conjuring")

Graymalkin Media

Ghost Hunters: True Stories from the World's Most Famous Demonologists

Demoniac - Macht der Finsternis                  

Demon Days - Im Bann der Dämonen [dt./OV]        

Audible

The Demonologist: The Extraordinary Career of Ed and Lorraine Warren - The True Accounts of the Paranormal Investigators Featured in the film 'The Conjuring'

Simon & Schuster

Paradise Lost: With bonus material from The Demonologist by Andrew Pyper (English Edition)

Orion

The Demonologist (English Edition)              

Independently published

The Rational Demonologist's Handbook            

Devil's Workshop                                

CREATESPACE

The Christian Demonologist Handbook - Workbook & Study Guide