We're continuing our series of Westeros History 101 with another installment in Summer School at the Citadel -- so if you're feeling a bit overwhelmed with the talk behind the Game of Thrones spinoff in the works, which deals with a Westeros thousands of years older than what we saw in the original show, pick up a quill and have a seat! Your co-maesters Petra, Samantha and Vanessa are back this week, talking about the Westerlands, the Reach, the Casterlys, and some other areas of Westeros we may -- or may not, it's still all speculation at this point -- see in the tentatively-titled Blood Moon.