The Last Kingdom (The Saxon Stories #1) by Bernard Cornwell

This is the story of the making of England in the 9th and 10th centuries, the years in which King Alfred the Great, his son and grandson defeated the Danish Vikings who had invaded and occupied three of England’s four kingdoms.

This thrilling adventure—based on existing records of Bernard Cornwell’s ancestors—depicts a time when law and order were ripped violently apart by a pagan assault on Christian England, an assault that came very close to destroying England.