Martin has been working on the series’ sixth novel, The Winds of Winter, since at least 2011, the year his last Game of Thrones book, A Dance With Dragons, was released.
In his blog post, Martin said House of the Dragon was “actually the first concept I pitched to HBO when we started talking about a successor show, way back in the summer of 2016.” The project, created by Martin and Colony showrunner and co-creator Ryan Condal, is set hundreds of years before the Emmy-winning flagship series and will be based on the book Fire & Blood.
He also shared his thoughts on “the bad news” – HBO’s decision not to go forward with the fantasy epic’s spin-off series with Watts, which he was working on with showrunner Jane Goldman.
“It goes without saying that I was saddened to hear the show would not be going to series,” Martin wrote. “I do not know why HBO decided not to go to series on this one, but I do not think it had to do with House of the Dragon. This was never an either/or situation.”