It is a scale, not a pigeonhole. It seems that Mistborn is veering towards sci-fi, so I guess it will become fantasy-ish sci-fi compared to the more pure fantas

It is a scale, not a pigeonhole. It seems that Mistborn is veering towards sci-fi, so I guess it will become fantasy-ish sci-fi compared to the more pure fantasy of the first book. I didn't read the latter books, but I guess it will never be pure, since it involves a magic system that is taken as an axiom, and I don't think there is any intention to tie it to the real world.