Edmund Blackadder
Scooby
I like to read. If a book has a story, I read. I do not waste time considering the fact whether another author/production company/office/whatever has put their stamp of approval on it. Reading is supposed to provide you with a visual imagination of that story. That's what I get and I'm happy.
Which is absolutely fine. That is how the books should be read...until you start discussing the show and elements of plot.
The books, numerous times, contradict what is 'canon'.
This is probably one of the reasons Joss, or to a greater extent Mutant Enemy, doesn't really have much connection with the books only in the leasing of the title and major story themes.
The moment they have a true link, these writers are creating stories that can be classed as 'canon' which will mess with what Joss and co have already made, or will decide to make, happen.