The book is a collection of horror short stories narrated in an unusual way. They are descriptions of the aftermath of tragic events, weird ruins and mysterious atmosphere and you have to piece together the clue to find out about the horrors that have occurred.
The same author of The Ritual
https://www.goodreads.com/book/show/51797060-wyrd-and-other-derelictions
Ah I grabbed this recently but haven’t gotten to it yet. It sounds really good!