I pretty much live and breath ASOIAF. I've read the books far too many times (if that's possible) and analysed the hell out of them. I heard about the book through A Podcast of Ice and Fire, of which I'm a massive fan. If you're a ASOIAF junkie like me then you should definitely buy this book. There's great pieces with some terrific insight into prophecy, religion etc and how they effect the world GRRM created. Buy it.