What I'd like to hear from people is not what they think canon is, but why it matters -to them-. So what if a novel they liked isn't "official". Does it matter?
As nearly as I can tell, they want to know if it's "really" part of the overall story/universe or if subsequent stories are free to ignore it. If the latter, why waste time reading it, no matter how enjoyable and/or entertaining it might be on its own terms?
I don't quite get it, but that seems to be the attitude.