This is probably just a coincidence but he mentions that King Aerys's fingernails grew to be nine inches long. Is it a stretch to think he might be a Trent Reznor fan? Probably. Also if you watch the old 80's movie Dragonslayer you will find a lot of the characters have ASOIAF names like Tyrion and Valyria and so forth. There are my high-fallutin literary references.