Bought there some time and read many times, I return to this purchase that interested me well overall. So yes, as reported vehemently in a previous review, this book is primarily based on the TV series, the first four seasons in reality, although reminders LOEUVRE literary exist. The analyzes and remarks are no less accurate and relevant. Anyway, the author GRR Martin wrote the saga slower than the series progresses, the differences will escalate in the future. There are comparisons with periods of art, historical facts etc ... There is a reminder of the different houses (with a bit of heraldry), genealogy etc ... Overall very interesting. Only downside: go to the optometrist for a check before because it is a little book, printed so small and tight. So figures are in a postage stamp format, which does not do them justice, pity ...