Repeat after me: No tie-in novels are ever truly canon, simply as matter of practicality. That's just the way things are, whether you're talking STAR TREK or MURDER SHE WROTE or THE PARTRIDGE FAMILY.
And that's probably for the best. If, God forbid, the movies or TV shows were actually obliged to treat the tie-in books and comics as Canon with a capital C, we'd never be allowed to do anything interesting in the books.![]()
Honestly, I could never figure out what Pocket was doing. In the 80s, they came out with printed guidelines of what was acceptable and what was not. They explicitly said: No stories involving time travel. Then what did they publish? Various novels involving time travel! They said No stories involving parallel universes. Then they publish the short story collections involving just that! They outlined a bunch of different things in 'canon' that they did not want to be deviated from. But they did not stick with that, either. I don't know whether there was some kind of favoritism thing going on with certain authors or what the deal was, but I know that I am not alone in feeling that policies were confusing, to say the very least. Do they want really good stories that people are going to want to read, which will sell books, or do they want to keep things bogged down with chaos that just sours new writers on the idea of trying to deal with them at all?