Fans have expressed concern that the popular HBO show may outpace the books in which the series is based on.

News.com.au reported Martin is currently attempting to write the sixth novel in the Ice and Fire series but is having difficulty doing so.

In a recent interview with New Mexico In Focus, Martin admitted that the impatience of fans and of HBO has affected the writing process.

 “Yes, to some extent it does (affect my writing), but when the writing is going well it doesn’t matter,” he said.

“When I’m there and working, I just kind of fall through my computer screen and I forget the world, I forget deadlines, I forget the TV show, and the emails and all of that stuff.

“It’s just me and the characters and the world that I’m describing, and I’m writing a page at a time, and a scene at a time and a word at a time.”

Martin hasn’t announced when he will finish the novels because he doesn’t want to place unrealistic expectations on himself or get his fans’ hopes too high.

Image via Getty