I dearly hope not, but this thought has occurred to me a few times. It's probably already been discussed here -- if someone is aware of the thread, please point me to it.
Does Kellhus realize that he's in a book? It's occurred to me that you could read a lot of the metaphysics of Earwa in the sense of a book containing knowledge of itself as a book. For example, the fact that human feelings like suffering and other negative feelings are meat to the gods arises from the fact that we don't read books about people who are happy. In that sense, we, or rather the appetites that cause us to read the books, are the gods. Likewise, the damnation of the inhabitants of Earwa could be said to exist only because Bakker picked up his pen. The world could be closed to the outside just by finishing the story, etc.
I don't believe that this is the direction that things are headed, and I'd be gratified if Bakker had authoritatively answered that this wasn't it. But absent that, could someone point out something contradictory about this so that I can stop worrying about it?