Remove DRM from PRC problems - Audio/video stream recording forums

I have a book that was free on Amazon called Grimm: The Essential Guide with the author listed as NBC Entertainment. Kindle for PC and my Kindle keyboard give an error that the book is "incompatible with this device", but I can view it on a Kindle Fire without a problem. Unfortunately as far as I know both the Calibre deDRM plugins and the python scripts don't work with books from the Fire unless you can provide the PID, which I can't. I remove the DRM from all of my books simply as a matter of course and have never run across this before. Does anyone have any suggestions?