The book is a good read from a psychological point of view and is very well written. The author shows real talent.
My reasons for giving it three stars is because nowhere in the book that I could see was there a mention of this being a fictional story, a non-fiction accurate telling of real events, or a fictional retelling of real events. I looked it over cover to cover to see but I couldn't find anything, so I am left confused as to whether this is a purely made up fictional piece or if it is an accounting of real events.
There is also some mild cussing and sexual content, but let's be honest, this is most likely the norm for high school teenagers. I am more concerned with the content being attractive in the wrong way to a teen who might empathize with the shooter as it does seem to sensationalize the act a bit.
Disclaimer: I received a free copy of the ebook in exchange for giving a review on the book.