Fans of George R.R. Martin's novel "A Song of Ice and Fire" are still waiting for the sixth book in the series, "The Winds of Winter." While Martin hasn't given an exact official publishing and release date for the book, a new rumor says there already is – on Martin's 70th birthday.

According to reports, Martin's 70th birthday would be the perfect time to release the highly-anticipated book. While some fans might be glad to know that, some won't be, because Martin will turn 70 next year, on September 20, 2018.

This rumor seems to have been fueled by a recent post from Martin's blog, titled "It's Publication Day..." In the blog entry, Martin talks about the Tor reissue of "Ace in the Hole," which is volume six of the "Wild Cards" series. Fans speculate that the release of Winds has been purposefully pushed back so that it can be released on Martin's 70th birthday.

Some of Martin's colleagues, however, shared an insight as to how he writes. Speaking to Insider, Elio Garcia and Linda Antonsson, who worked with Martin on a book called "A World of Ice and Fire," says Martin is the kind of writer who likes to experience the story as he writes it. He feels that once he has outlined the story and has seen the end point, he feels bored when he goes back and revisits it.

Unlike other writers who prefer to create a storyline or outline before embarking on the details, Martin prefers to create the story as he goes. He admitted a long time ago that he doesn't like to make outlines because he loses in a story when he knows where it's going.

Still, Martin promised that the book will come out soon. He said a while ago that he stopped working on other anthologies until he finishes the Winds of Winter. Well without an official release date, all fans can do right now is speculate.