Originally Posted by Spidey-Bat
Considering how long he's taking for ASOIAF and his well-documented disdain of fanfiction, we'll probably never see a book about Sothoryos.
But what does his disdain for fanfiction have to do with him writing a book about Sothoryos? He has already written other books about Westeros (Dunk and Egg novellas) he could do the same after ASOIAF. Even if he never does a book anout Sothoryos, I dont see him being entirely finished with this world after ASOIAF. Its too big and his baby. He will probably dabble in it until he dies. It doesnt even have to be novels. Hopefully that history book he wrote that I linked to above will have new info on the whole world.