Conversation so far:
how many episodes are there in season one of game of thrones
There are 10 episodes in season one of Game of Thrones.
When did Game of Thrones premiere
The series Game of Thrones premiered on HBO on April 17, 2011 in the U.S
What is the series Game of Thrones based on
The series Game of Thrones is based on A Game of Thrones, the first novel in the A Song of Ice and Fire series

Question: Who wrote the book series
Self-contained rewrite: Who wrote the Song of Ice and Fire book series