I love the novel A Song of Ice and Fire.
I haven't yet read the epic fantasy novel by George R. R. Martin.
I highly recommend the series if you enjoy the fantasy genre.
Have you read the 5th and most recent volume in the series? It's "A Dance with Dragons."
I have not, I've only recently started reading the series due to the TV show. 
The author's inspiration for the series came from Wars of the Roses.
So I've read. He was also inspired by French history novels such as The Accursed Kings by Maurice Druon.
Yes and that was a sequence of 7 historical novels by French author Maurice Druon.
After I finish reading the series, I'll try reading those as well to see how much influence it had over Martin's own work.
I might have to try both series as well!