Very imperfect Shadow: Disappointing, if you like the cycle of the Angel of the Night

Disappointing, this sums up the situation.
I enjoyed the cycle of the Angel of the Night.
Knowing the author and publisher, I bought - naively - almost closed eyes.
This book (?) Adds nothing to the cycle, but is harmful to the author and publisher.
Disappointing when the amount:
-soi-called 220 pages, but my reading lamp says 112 pages (and at the same time 1,731 pages for the trilogy)
It consists of:
- A first story, 47 pages, ripped, chopped (sloppy?) (?). To be considered more as a collection of background notes to write the series, and as a separate book.
- A glossary of 29 pages;
- A list of the characters in 15 pages;
- A narrative 'bonus' of 8 pages
- Few different pages (biography)
Both say a tote inconsistent.
The quality to believe that the author has fallen, or that it was not intended for publication.

To completely discouraged if you wanted to have a credible overview of the author.
Not advised, if you like the author, as this would be enough to make it unreadable.

Prefer reading cycle which it has consistency. And even if you limit - by choice - the first installment, it will be better than buying something na very little interest.

Leaving this 'nonsense' (hard?), I plunged back into the ring, to be sure I was not doing me any illusions about this thing, or the cycle itself.
Confirmation: I read with pleasure the first 500 pages of the cycle (lintégrale) having the desire to continue and continuing to curse the guilty having produced / published / edited, a 'complement' so destructive, so harmful to the images of the author and publisher.

Disappointed, more than that.
Annoyed, almost annoyed at having allowed myself to buy solely on the reputation of the latter two.
Significant collateral damage.