Paulo Vicente asks: are the Incas independent in this world?

Yes, although I reserve details to be revealed in future works. Speaking generally, I have posited that the difficulty involved in transporting dragons across the ocean (or even vast land distances, as seen in Black Powder War) would have thwarted many colonization efforts to a greater or lesser extent depending on the native population's air power. This gives me the opportunity to make life a good deal more interestingly difficult for my characters by putting more players on the world stage, and to explore more what-if scenarios abroad while starting the reader off in a comfortably historically accurate situation in Western Europe.

Paulo is joined by Jim Weaver in asking about the release of a timeline.

I have a timeline for my own use and very likely will eventually release it, but I am not yet ready to give up the freedom to tweak it behind-the-scenes as the series continues. Continuity is important to me, so I am chary of making details canonical unnecessarily, as those then become additional constraints on what I can do in future.