 On April 25, 2018, Martin announced the release date of his new book, "Fire & Blood", dealing with the history of House Targaryen, which was released on November 20, 2018.HBO Productions purchased the television rights for the "A Song of Ice and Fire" series in 2007 and began airing the fantasy series on their US premium cable channel on April 17, 2011.Titled "Game of Thrones", it ran weekly for ten episodes, each approximately an hour long.