'Game of Thrones' writer George R. R. Martin says he's developing "a couple more shows for HBO"

The writer is also currently working on some other 'Game of Thrones' prequels for the network George R R Martin - Credit: Getty Images Game of Thrones writer George R.R. Martin has revealed that he is developing some new shows for HBO, in addition to the Game of Thrones prequels he is already working on.