What author wrote the book series on which an HBO fantasy television series Joseph Jason Namakaeha Momoa starred on was based?
Jason Momoa Joseph Jason Namakaeha Momoa (born August 1, 1979) is an American actor, model, director, writer, and producer. 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).
Tim Powers Timothy Thomas "Tim" Powers (born February 29, 1952) is an American science fiction and fantasy author. Powers has won the World Fantasy Award twice for his critically acclaimed novels "Last Call" and "Declare". His 1987 novel "On Stranger Tides" served as inspiration for the "Monkey Island" franchise of video games and was optioned for adaptation into the .