'Game of Thrones' Season 4 Spoilers: Leaked Photo Shows Craster's Keep Location. New Episodes Premiere Spring 2014 on HBO

Fans of the Game of Thrones book series might be a little upset to learn Season 4 of the HBO TV version is going to stray a little bit from author George R.R. Martin's A Song of Ice and Fire storyline.

Believed to be based on the second half of book 3, recent photos from the set of Game of Thrones Season 4 have leaked online showing the location used for Craster's Keep. Fans of the book know Craster's Keep is not featured in that part of the book series.

If you saw the last season of Thrones you know the last time Craster's Keep was featured, a fight broke out and the Night's Watch commander Jeor Mormont was killed by the hand of his own bretheren. That's the last time we saw the Keep and that's the last time it appeared in book 3.

So if the writers for Game of Thrones Season 4 are returning, they must be creating alternate plot lines. ComicBookMovie.com reports the Keep will serve both Jon and Bran's story arcs. Do they rendezvous and seek shelter in the house?

If the rest of Season 4 stays true to the latter half of A Storm of Swords, then look out for the death of major characters, large-scale warfare and political marriages.

Spoilers indicate the end of the season will feature an epic battle at Castle Black. Will the wildlings and walkers finally cross over the wall?

Game of Thrones Season 4 is set to premiere new episodes on HBO spring 2014.