Yeah, but from what I'm hearing from book readers, in 18 years between first book and latest one, R.R Martin is notorious in completely underusing the white walker aspect of the story, so it should be a good thing that the tv people are taking the creative license to expand on that part of the tale instead of just ignoring it. They been starved with details it seems, and R.R Martin surely must be approving this new revealing approach to white walkers in the tv show. My bro was gobsmacked watching the final scene (dont know about the night king part yet), the fact that they showed how the white walkers "add to their numbers", and what they do to the babies, is a major game changer reveal for book series fans.