Here's what we know about "A Knight of the Seven Kingdoms: The Hedge Knight", the next "Game of Thrones" spin-off due ... Sign up to get the BEST of Tom's Guide direct to your inbox.

In the years since HBO's fantasy saga aired, there's been a ton of chatter about "Game of Thrones" spin-offs ... Sign up to get the BEST of Tom's Guide direct to your inbox.

In the season 4 premiere of HBO's Game of Thrones, King Joffrey Baratheon (Jack Gleeson) flips through the pages of the Book of Brothers, a log of all the great knights of the Kingsguard.