Other than the 1920s Arkham setting and the conceit of a forbidden tome, Dark Revelations is relatively free of the tropes of Yog-Sothothery. It is an altogether more traditional sort of supernatural horror story. As well as disdaining Cthulhu and the Necronomicon, this tale is mostly at a remove from the the sort of pulp action tone that sometimes informs the literature for the Arkham Horror games. There are a number of features that brought this novella closer to the jauniste vein of The King in Yellow than to the so-called Cthulhu Mythos. The main characters are creatives rather than academics or researchers, and there is a connection to medieval France.

The protagonist is author Gloria Goldberg, one of the investigator characters from the games this book was written to support. Gloria is a widow from New York who ventures to Arkham when called on to help with the literary estate of a recently deceased colleague. There are italicized passages throughout the book, and it can be difficult to tell from context whether these are passages that Gloria is reading, ones she is writing, or some other sorts of dreams or visions. As the story proceeds, it invites the reader to discard distinctions among these categories.

The book includes a set of about a dozen glossy color pages at the end, featuring news clippings, fragments of manuscripts, and pages from reference books relevant to the novella. This appendix section is a standard feature of this book series, and the contents in this case are entertaining enough, without any of the clinkers I've seen in the other novellas.

Dark Revelations comes with a set of cards debuting the Gloria Goldberg character for Arkham Horror: The Card Game. She is a flexible mystic-class investigator with a special ability that helps her to manipulate the encounter deck. Her alternate signature cards unique to this release are the ally Ruth Westmacott, a book illustrator whom Gloria befriends, and the treachery weakness Liber Omnium Finium.