Game of Thrones fans watch in delight as the epic battle of Lannister and Stark entangles the Seven Kingdoms. But only the sharpest notice how these houses echo Lancaster and York in the War of the Roses. Druids, Catholics, and even Zoroastrians wander through Westeros, reframing their religions for a new world of fantasy. But how medieval is Westeros? Did lady knights and pirates really battle across Europe? The book Winter is Coming: Symbols and...