In latest 'Game of Thrones' news, 'A Song of Ice and Fire' book series writer George R.R. Martin revealed that the upcoming fifth season of the popular HBO series will now feature brand new deaths to characters that did not originally occur any of his previous books.

"People are going to die who don't die in the books, so even the book readers will be unhappy," said Martin to Showbiz411 at the Writers Guild West Awards this past weekend.

"Everybody better be on their toes. [Series creators] David (Benioff) and D.B. (Weiss) are even bloodier than I am."

Martin also hinted that the popular cable series may surpass its proposed seven year run, due to the aforementioned fantasy drama show's success on the small screen.

"Not really certain yet. This is the fifth season, the sixth season HBO picked up last year. We will have a 7th, 8th or 9th, no one knows. They only renew one or two seasons at a time. After we do season 6, maybe we'll get a renewal for 7th and 8th. That all depends, Television is a very changeable medium," said Martin.

"Yeah, it's the hottest show on TV now, but will it be the hottest show on TV two years from now? Hot shows come and go and television changes, and I've lived through that before. I certainly hope that we get to tell the entire story."

The 66-year-old New Jersey native also gave an update to his upcoming 'The Winds Of Winter' book that is rumored to arrive in book stores by year 2017 at the latest.

"Because whatever happens with the show I'm going to finish the books, it will be seven books. But each of these books are 1500 pages long and they each have enough material in them for several seasons," said Martin.

"I have two more books, the one I'm writing right now, 'The Winds Of Winter,' and after that the last book, 'The Dream of Spring,' so those will be the two final books. But we're talking 3000 pages of material. How many seasons that translates too? That's up to D.B. And David."

'Game of Thrones' returns for its fifth season on the HBO network on April 12, 2015.