Martin is taking too long to complete the series. He took 11 years to write the last two books. It's been nearly three years since then and there is no release date in sight for TWoW. His editor said he had only submitted about 180 pages and that was back in February. He had written a bit more than that apparently but it has yet to be submitted. These are 1000+ page books and as of 4 months ago he hasn't submitted even a fifth of that. Seems like there's no way it's coming until 2016 at least. He still doesn't know if he will add an eighth book. He continues to leave the door open for more. From what I've gathered he keeps hoping D&D will drag the series out by adapting the next two books over three seasons or maybe movies or whatever and they aren't doing that. They said seven seasons and have left the door open for an eighth which will probably happen. I highly doubt they will string it out further than that. What D&D have said regarding the shows timeline and what Martin has said don't match up. It's like he's been in denial. He needs to stop pissing around and finish the books. Even if he sticks with seven, which is somewhat doubtful, it will be at least 2020 before they are done. That's if he lives that long.With the huge head start he has had on the series its ludicrous that D&D should be in this position. Yes, they sat down with him and have roughly gone through each character and their fates, but they are doing an adaptation on a series of books and soon they won't have any books to adapt.