Like Dave, I read Greg's, "Norse Code" before I came across the short story that inspired it. I have to say, I'm glad now (Sorry, Greg!) only because the short lost nothing for having read the novel, and it served to remind me how much I loved the novel to begin with!
Kid v Squid is my next VanEekhout on the TBR pile, but I might have to skim through NC again, just to relive the...fun? of a more detailed Ragnarok.