This book is definitely one of those "did I read the same thing as everyone else?" books.
I'm just going to throw it out there that, according to a search, there are 272(!) exclamation points used. In a book primarily about demoniacal (I will never use demonic again) possession. Suffice it to say, I had some issues with the writing of the book.
But even as frustrating as the writing was, it had nothing on Ed Warren. I guess I should have assumed that it was going to focus heavily on the Warrens themselves, rather than the cases they worked on. Some of their cases are discussed, but it is less on the people directly involved with the activity, but instead the repercussions that the Warrens faced. And the fact that they constantly put themselves in danger of being killed, but they help anyway--of course. Not to mention that, Ed particularly, is incredibly well known amongst demonic entities, almost every religious community in the US and the UK, and can pretty much blink and exorcise (albeit temporarily) an entity from someone. He is just that amazing!
So, I'm probably making the book seem worse than the it actually is. There are moments of it being genuinely interesting and creepy. There were a couple of cases that were new to me and gave me a starting point to actually look into them rather than the Warrens themselves. But for the most part, it was all about how amazing Ed Warren was from the man himself(!), with a little touch of Lorraine (who in my opinion is far more interesting, but I digress) added in. When it was all said and done, it was a not so well written account of a man who probably did amazing things, but just read as being so annoyingly pompous that it was detrimental to the book as a whole.