Book blow away the common narrative. Certain self-serving vassals played both sides forcing patron to call them to explain themselves. Book explained why two superpowers chose to battle at certain time over land (hint: strategic trading hub from the Mediterranean sea & Southern & Eastern land routes).
Series of unplanned events precipitated accidental iconic battle between mostly professional army with smaller impressed "foreign mercenary" units against feudal army.
Cold war ended because Assyrian ascendancy scared the Hittite king.