User blog comment:Serojja/Greyscale - GoT and ASOIAF Lore Video/@comment-29740399-20160925042253/@comment-29409633-20160925133439

Hi, thanks! Yes, some of the information is originally taken from The World of Ice and Fire book, some - from A Song of Ice and Fire books. But I personally took it mostly from a Wiki of Ice and Fire article. The article here, on Game of Thrones Wikia also contains a lot of interesting information on it.