While George R.R. Martin has said that he is still working on "The Winds of Winter," a new speculation claims that the book's publisher is already preparing for its upcoming release.

A report from Digital Spy revealed that Reddit user Burnfyre spotted another ISBN registration of "The Winds of Winter."

The Redditor claimed that he has no idea how when Penguin Random House registered the new ISBN 9780553801538, but he believes that the information gathered was valid since the prefix number 978-0-553 belongs to Martin's official book publishing company.

But an early ISBN for the sixth installment of Martin's "A Song of Ice and Fire" book saga had been registered more than a year ago. This means that one of them might not be the real deal.

Meanwhile, Martin commemorated the 20^th anniversary of the release of "A Game of Thrones" by looking back on the events that transpired during the past two decades through his LiveJournal account.

"It has been a helluva twenty years, twenty years that have transformed my life and career, twenty years during which the novel has never been out of print. And something like that has to be commemorated," the 67-year-old novelist wrote.

He also announced that in celebration of the anniversary of "A Game of Thrones," Bantam Spectra published a special illustrated edition of the book. The new illustrated edition will go on sale beginning Oct. 18.

He also shared a photo of himself taken in Scotland after he signed the contracts for the first three books under the "A Song of Ice and Fire" saga back in 1995, saying that it was taken several weeks after he missed his first deadline on the series. "Ah, how innocent I was... little did that guy in the picture imagine that he would be spending most of the next two decades in the Seven Kingdoms of Westeros with Tyrion, Daenerys, Arya, Sansa, Jon Snow, Bran, and all the rest," Martin added.

He also said that he is still working on the next installments of the book saga until now, and he still has no announcement regarding the release date of "The Winds of Winter" up to this day.

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