I was very disappointed after reading it because I realized that most of the facts mentioned in this book are either false, incomplete, talked about in a completely useless perspective, or lacked enough reason to convince the reader that they are true and reliable. I know this because I've researched about a number of these "supernatural" entities and found that there is so much more to these accounts than is written in this book.
This book was written in way to make the information seem brand new and utterly shocking, and because of that the writers decided to exclude major chunks of each fact or story that could have completely changed the interpretation and impression the readers got from reading it. It frustrated me that some of the stories mentioned were very noteworthy but were missing chief events that would have otherwise made them more reasonable and understandable for the readers.
Other than that, I liked how the language of the book is simple enough to suit all ages. I also liked how it includes the original names in English. It is a book to read just for fun, and should not be taken too seriously, especially since it talks about questionable topics.