Re: A Song of Ice and Fire books
He could visit Sothoryos in one of the last two books, couldn't he? I'm certain in a video interview Martin had an interest in much smaller scale stories set in his world. There's also a TCG out based on ASOIAF, so perhaps he has become more lenient toward fanfiction or, at the least, a semi-shared world approach.
"For he had promised her that, when she first saw Tanelorn, she would be riding upon a dragon."