The book's also a solid 'Making Of'. Author Bryan Cogman (a story editor on the series) has interviewed the show's key creative forces, and between them they reveal the attention to detail that's gone into realising the Seven Kingdoms. Particular focus is given to pivotal scenes like the storming of King's Landing, and it's here - when things get properly geeky - that the book's at its best."
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For the most part, people who watch and adore HBO's adaptation of author George R.R. Martin's Game of Thrones saga (released in book form via the A Song of Fire and Ice series) do so largely, though still pleasantly, in the dark. Give any random viewer a pop quiz with questions about which character belongs to which family, and how to spell characters' names, and the grades would be sub-par at best. Thankfully, the dense story lines are much easier to sift through and grasp thanks to Inside HBO's Game of Thrones. Combining in-depth cast and crew interviews with Martin's own insight, it's 192 pages of Westeros overload, perfect for a few months of catching up and/or refreshing before the show returns for its third season"
Complex.com