What author wrote the book series on which an HBO fantasy television series Joseph Jason Namakaeha Momoa starred on was based?
Jason Momoa:  He is known for his television roles as Ronon Dex on the military science fiction television series "Stargate Atlantis" (2004–2009) and as Khal Drogo in the HBO fantasy television series "Game of Thrones" (2011–2012). Khal Drogo: Khal Drogo is a fictional character in the "A Song of Ice and Fire" series of fantasy novels by American author George R. R. Martin, and its television adaptation "Game of Thrones".
i don't know