Westeros is a massive, fleshed-out world full of stories to tell. With the main Game of Thrones story concluded, HBO is looking to mine George R.R. Martin's fantasy universe of every story they can find. The latest Game of Thrones spinoff to see movement at the network is 10,000 Ships, which now has its writer according to a report from Deadline.

Amanda Segel will write the spinoff series for HBO according to the report. Segel previously wrote and produced on shows like Person of Interest, The Mist, Nikita, and The Good Wife. 10,000 Ships is set one thousand years before the events of the Game of Thrones television show and A Song of Ice and Fire novels. The story follows the journey by Nymeria (after whom Arya Stark's direwolf is named) and the Rhoynars from Essos to Dorne following their defeat by the Valyrians.

If you're a huge Game of Thrones fan and you haven't heard of this one, don't worry--HBO is getting pretty obscure here. Nymeria's story is mentioned a few times during the novel series; the companion book The World of Ice & Fire: The Untold History of Westeros and the Game of Thrones goes into more detail, but this is not a book you've missed out on somewhere or anything like that.