[jackm8]

As nonnative English speaker, this has bothered me for years. I've bought books thorough UK Amazon that had American spelling (amongst those, complete works of Shakespeare, ironically), and just lately, I've even come across two different volumes of the same book on Project Gutenberg that are each in different spelling. It's not a major issue, I guess that there's just something in me that likes to read words as they were written. I've learned to look at publishers to discern a bit, but it's really not perfect. For modern books it is usually the norm that they are each issued in spelling, based on where publisher is based, but for classics it's possible to find modern American based publishers that publish in British spelling, and British publishers that import modern pulp as is.
What I'm really puzzled about is, why isn't it ever mentioned in which spelling the book is issued? It's never mentioned on marketplaces, Amazon, Nook, Project Gutenberg, Internet Archive. Only sure way of knowing for me is downloading a sample, when available, and searching for armour/armor colour/color in it. Why is that?