It's happened before. The 1980s novel shared continuity ceased to be with Star Trek: The Next Generation, and Ann Crispin's Time for Yesterday was its final hurrah. There are differences between what the novels were like then and what the novels recently were. Back then, the novels shared characters but not plot threads, while recent novels shared both. Yet, with any tie-in, there's always a chance that something later on will come along and overwrite it. That doesn't make the books any less valuable. I mean, First Contact rendered Strangers from the Sky mostly fiction, but it's still one of my favorite books, and it still has an important place in my library. If there is, let's say, a 26th-century series, the novels haven't gone away from your library. The enjoyment you received from them isn't lessened. And they're always there for you to revisit.