Supernatural Encounters Prep: The Book of Sith
One of the few Star Wars books I chose not to add to my collection but have read.
The reason for this is the awful "scribbled" commentary from Star Wars characters that are found within the book. From Palpatine making notes to himself to Vader circling a passage that may help him overthrow the Emperor someday (whoops! May want to hide that from your master doofus!)
The book discredited itself over these reasons in my eyes and I decided not to purchase it or any of the others that came out like it.
However, if you're so inclined it will be mentioned in the upcoming novel which is why it's on this list.
Is it worth reading? THAT is the real question.