Martin has a reputation for taking his time with the dense, intricately-detailed ASOIAF books (Six years passed between the publication of the fourth and fifth installments.), and with at least two books remaining in the series, many fans are concerned that the 65-year-old GRRM won't live to complete his masterpiece.
Asked about that possibility in a recent interview, Martin replied angrily:
"I find that question pretty offensive, people speculating about my health and my death," said Martin. "So fuck you to those people."
We would imagine it's a bit depressing to have millions of fans openly taking guesses as to when you're gonna croak, but surely George can understand why fans might be a bit concerned.
There's recently been talk of Martin adding an eighth book to the series, which would mean that the fight for the Iron Throne would carry us well into the next decade.