George R.R. Martin, creator and author of A Song of Ice and Fire, has said that three of the five Game of Thrones ' spinoff series at HBO are "moving forward nicely."

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Game of Thrones Spinoff Writers: A Breakdown 17 IMAGES

Martin published a new "not a blog" post on his website and, alongside praising Avengers: Endgame, gave a little update as to the status of the upcoming Game of Thrones spinoff series that will fill the void following the end of this final season."Oh, and speaking of television, don’t believe everything you read. Internet reports are notoriously unreliable," Martin wrote. "We have had five different GAME OF THRONES successor shows in development (I mislike the term “spinoffs”) at HBO, and three of them are still moving forward nicely. The one I am not supposed to call THE LONG NIGHT will be shooting later this year, and two other shows remain in the script stage, but are edging closer. What are they about? I cannot say. But maybe some of you should pick up a copy of FIRE & BLOOD and come up with your own theories."Fire & Blood is set 300 years before A Game of Thrones and focuses on the history of the Targaryen family. It begins with the Aegon the Conqueror, creator of the Iron Throne, and follows many who followed after.As for this "The Long Night" one that Martin isn't supposed to be calling it, it was revealed last year that this particular Game of Thrones spinoff got a pilot order at HBO and will be developed by Kingsman and Kick-Ass' Jane Goldman, and co-written by Goldman and Martin.The story is said to take place thousands of years before the events of Game of Thrones during the Age of Heroes and will explore the origin of the White Walkers and the history of the Stark family. Game of Thrones co-executive producer Bryan Cogman was also set to develop one of these prequel series, but he recently confirmed that HBO would not be moving forward with his project. While some of the series are progressing nicely, they are still a ways away and we still have three episodes left of Game of Thrones. As you wait for the episode four, be sure to check out who has the best odds of ending up on the Iron Throne, how some claim the biggest Game of Thrones episode is yet to come, and also how and where to stream every episode of this final season.

Have a tip for us? Want to discuss a possible story? Please send an email to newstips@ign.com.Adam Bankhurst is a news writer for IGN who wants to binge watch all these shows in a row right now. You can follow him on Twitter @AdamBankhurst.