Have you managed to avoid spoilers during whole month ?
I have. It's not difficult considering no one in my waking life is reading this book, and it's easy to not click the SPOILER tags when people use them on here.
EDIT: A few chapters in and so far, so good. A very different experience so far from The Cold Forge (TCF is the only Titan Alien novel I've read, barring the Covenant novelization) but I'm immediately interested in this world and want to see where this goes. It was also a very nice touch, given the structure of this story, to see a map up front at the start.
EDIT 2: Just finished chapter 15...
So the book is actually going to acknowledge there being a difference between the smooth and rigid heads...
To be honest, I've always just chalked it up to artistic interpretation and don't really bat an eye when a story chooses one option or the other, though I don't mind Cameron's take that the domes eventually molt off with age. I'm going to assume that that's the intention here.