As a big fan of the series I preordered this book and waited for the intervening months with great anticipation - only to be let down.
On the good side the information is interesting, but it's nothing new if you're into folklore, mythology, ghost stories, etc.
However, it is printed on that porous cheap paper that deteriorates rapidly and attracts weevils, because of this cannot place the book next any other books you wish to keep for posterity. If you do the other books suffer.
The book is written from the point of view of Sam Winchester, or at least the introduction was.
It appears to be a version of John Winchester's monster's and demon's Filofax. Yet it lacks any imagery of Sam, Dean and John Winchester or of the ghosts, demons, etc. Since it was based on the show, and based on an object featured in the show, it would be more appealing to fans if it had contains some of the promotional photography that is used to the series and on the cover. This is one of the biggest disappointments about the entire book.
As a Winchester fan I was looking forward to information about the spooks, ghouls and ghosts, some of the folklore that appeared in the show, along with some photographs and stills from the show. In this, the cover of the book is very misleading (and in my opinion deliberately so).
There are some black and white sketches of various spectres and spooks but no stills.
The cover is glossy and full of photographs from the series. This gives a false impression as to its contents such photographs could have been used to illustrate the various ghost, ghouls, monsters and spirits, but this is an opportunity which the publishers did not take. The blurb on the back of the book states that it "contains illustrations and other detailed descriptions" these illustrations are the black pencil drawings and sketches.
This was a book with a lot of promise that has failed to deliver by the cost-cutting and money grabbing of the publishers.