While this book provides a helpful overview of the chronology of horror games, it lacks any real analysis of the genre and instead the author chooses to lavish his opinion with every adjective he could find in the thesaurus. If the author wished for the book to be a straightforward history he should have removed all personal bias. The writing itself is far too colloquial and the author makes no effort to explain information to the uninitiated - it assumes prior knowledge and quotes people without explaining who they are. As someone familiar with the area I got through the book no problem but anyone approaching horror games with no knowledge will be in for a few trips to Google and back for the book to make any sense.
Treated as a list of horror games, it's semi-decent. Treated as anything more, it has no merit whatsoever. Absolutely no books are referenced, no articles, no academic journals, no sale release data from game companies, no reviews - only a few websites, and even then with no specific linkage to the text. No fact is cited, and aside from the dates given for release everything written about each game should be taken as mere opinion, not fact. This essentially invalidates 98% of the book.
Halfway through, the editor seemed to give up proof reading as paragraphs jumped from one game to the next with no explanation, no context and no real overall "point". The entire book reads as a first draft of a sixth form student's essay. A shame really, because it could have been very interesting.