There are all sorts of supplementary materials for George R. R. Martin's A Song of Ice and Fire series. You can watch the fantastic HBO series, check out a Game of Thrones cook book, or read a graphic novel.
One of my favorite stories is The Hedge Knight , and tells the story of Dunk and Egg. Close readers of the books will recognize these names from the rule of the Targaryens, before dragons left the land.
You can also catch up to the series with the graphic novel version of the books. Volumes 1 and 2 are in the system, with volume 3 on order.
And for those who were interested, here is a link to the GoT cookbook .