Henry Rohmer 
Hunger Of The Soul: Supernatural Thriller [EPUB ebook] 

A New York private detective encounters the incomprehensible and falls under the spell of the Devil incarnate.
‘The guard who stood opposite me did not move. A gasping sound came over his bloodless lips. ‘The flesh under his pale skin faded in an instant. In seconds, the man turned into a mummy of leathery skin and protruding bones. Parts of his body crumbled to dust before the whole body hit the ground heavily lengthwise.
The skull detached itself from the torso and rolled on for another half meter.
The eyes glowed bright red for a moment, then this eerie fire went out…