RogalDorn said:
That would be the ideal situation, yeah - obviously some things slip through the editors' fingers (as George mentioned), but what I consider noteworthy in that quote is that GW/BL does not even try to attempt enforcing any conformity between the novels - which, imho, automatically disqualifies them as reliable sources, seeing that one book can easily be contradicted by the next, and none trumps the other.
That the books may not even adhere to the studio material (even when they are clearly supposed to, as you correctly pointed out) only makes it worse - but on the other hand it doesn't even matter that much, as you can't really nominate one novel over the other.
Another interesting aspect of that quote, however, is that novels are supposed to be written in accordance to the existing studio material - they are not meant to rewrite it. Meaning: If a licensee writer comes up with something that contradicts, say, stuff in a Codex, then this just means he made a mistake, not that the Codex is suddenly outdated. I'm sure nobody here wants multilaser marines, for example.
Now, I don't mean to "bash" BL or FFG or its authors - on the contrary, I like lots of books released by both companies, and will continue to buy them (if amazon lets me *shakefist*). I'm merely advocating the preservation of a single official setting that comes with certain facts that should remain unviolated.
If a player wants to change something for his own game, great! I just think I'm not alone in wishing for a
solid basis
to expand upon. And said basis needs a clear canon policy. Judging from the citations, it seems to exist - they just don't like to talk about it. Which is somewhat understandable, but sadly leads to many unnecessary debates amongst the fans trying to sort out contradicting information.