The Citadel

http://time.com/4791258/game-of-thrones-george-r-r-martin-interview/

[Note: This is a long interview, but bear in mind that there's a significant focus on George's love of comics and his involvement in comics fandoms in his earlier years. However, at the end there's a fun snippet shared by Edelman, of an interview he did in 1993 in which GRRM mentioned in passing that he was working off-and-on on a fantasy novel.]

http://www.scottedelman.com/2017/07/21/down-drunken-noodles-with-george-r-r-martin-in-episode-43-of-eating-the-fantastic/

http://www.galaxysedge.com/mint.htm

http://www.ew.com/article/2016/04/18/game-thrones-george-rr-martin-spinoff

http://www.ign.com/videos/2016/02/24/the-winds-of-winter-twist-will-involve-a-character-dead-on-game-of-thrones

http://www.newyorkjets.com/news/article-randylangefb/Talking-Fun--Games-with-George-RR-Martin/6069527f-f234-4946-9b7b-a70831c3bf1c