#3, The Empty Throne, by Bernard Cornwell

This is the 8th of the Saxon Chronicles featuring Lord Uhtred, a Saxon raised by Danes, a pagan serving a Christian lord, and a great warrior. This series was originally planned as a trilogy, I am told, but thank goodness Bernard Cornwell didn't stop at three. The stories tell of the struggle to drive the Danes and Norsemen from Britain and unite the four kingdoms into one. Fun, fast-paced, and exciting.