Let's put it this way, the Game of Thrones novels, and Game of Thrones HBO series, would not be nearly as interesting without this author's two books (see Game of Thrones Season One Essays Illustrated Edition). Game of Thrones comes in threes: (1) original George Martin's GoT novels; (2) the GoT HBO video series; and (3) Pearson Moore's insights. Pearson sees so much more than I.
I can't speak more highly of Pearson's books. Pearson is AMAZING. A+.
As an aside, I accidentally discovered that he wrote another book, Cartier's Ring: A Novel of Canada, a novel set in Quebec, Canada. I have a Beauregard ancestor from Quebec who emigrated to New York State by way of the Champlain River, and would like to know what it felt like to live there in wilderness days prior to 1850. I'm becoming interested in how the St. Laurence River (Seaway) has impacted the general well-being of both Canada and the USA. I haven't read it yet.