By the beginning of the 9th Century, the "Hounds from Hell" came out of Scandinavia and sailed to the East, West, and South in their longships. The Vikings plundered, raped, killed, and took slaves everywhere they raided. Meanwhile, in the northwest corner of Spain, Asturias, the last stronghold of Christianity, Asturians still fought the Moors to keep their independence. It was a matter of time before Pagan, Christian, and Muslim confronted each other, with unintended consequences, when a Christian, novice Princess, Isabela, was taken from a convent as a slave, and an Asturian nobleman,...