George Raymond Richard Martin (born George Raymond Martin; September 20, 1948), is an American novelist and short story writer in the fantasy, horror, and science fiction genres, a screenwriter, and television producer, known particularly for A Song of Ice and Fire, which HBO later adapted for Game of Thrones.
After Brian takes several pills intended for Stewie's ADHD in "Pilling Them Softly", he is inspired to create a two thousand page novel and build a model to go along with it. He takes Stewie and his creation to a book fair to meet George R. R. Martin who identifies the work as generic space and fantasy crap inspired by the drugs Brian has taken. The judgment brings Brian back to earth and he and Stewie agree that they don't need the pills after all. Later, the real George R. R. Martin chases off the impostor who is making out with a fan, declaring that he had taken his place.