In a way, it all starts falling apart 'round here.
Not to say the book is bad.
(Actually - it's quite amazing, how while reading the book, you just accept everything at face value and go with it, and only after you're done, and had some time, you notice how totally stupid most of it was...)
I found the book quite disturbing on a few levels, the least of which is the whole idea of legillimency.
... Probably, only the idea of 2nd books' DADA professor's misdeeds disturbs me more.