It seems to me the Japanese covers of the Song of Ice and Fire books by George R. R. Martin should be more famous on the Internet, uniquely Japanese as they are. Despite the existence of these books, I've never met a Japanese GRRM fan and have to say there's essentially zero awareness of the books here. Presumably that will change when the Game of Thrones drama is shown on WOWOW or NHK or whoever picks it up.
Possibly spoiler warning if you've not read the books (and if not, stop reading this and go do so now!)