The powerful and innovative King AEthelstan reigned only briefly (924-939), yet his achievements during those eventful fifteen years changed the course of English history. He won spectacular military victories (most notably at Brunanburh), forged unprecedented political connections across Europe, and succeeded in creating the first unified kingdom of the English. To claim for him the title of "first English monarch" is no exaggeration.

In this nuanced portrait of AEthelstan, Sarah Foot offers the first full account of the king ever written. She traces his life through the various...