I only read the first 6 pages before I let a friend take the book to look at - but in those first 6 pages I noticed:
The year DS ended on the Sci-Fi Channel is wrong. The book says 2001, yet it actually ended in December of 2003. (And there's abundant proof of that right here on the forum.)
And also, the book says something like in 2006 Depp finalized his rights deal to do a film version of DS, yet Variety and any number of reputable publications reported in late July of 2007 that the deal had just closed then. (The complete text of, as well as a link to the Variety article is in reply #6 of the topic that you started ("It's official: Dark Shadows returns as a film with Johnny Depp") on the Current Talk board back on July 26, 2007.)