Robert W. Chambers 
In the Court Of The Dragon [EPUB ebook] 

‘In the Court of the Dragon’ by Robert W. Chambers is a chilling tale about a man who attends a church service, only to be pursued by a menacing organist. As he flees through the streets, the sense of dread intensifies. The boundaries between reality and nightmare blur as the protagonist confronts an overwhelming, inexplicable terror, leading to a haunting conclusion that questions the nature of existence itself.