This book is a comprehensive look at the history of the Ulfberht swords, a type of sword that was used in Europe from the 8th to the 11th centuries. It examines the origin of the swords, the materials used to make them, and the cultural significance
From Wikipedia
The Ulfberht swords are a group of about 170 medieval swords found primarily in Northern Europe, dated to the 9th to 11th centuries, with blades inlaid with the inscription +VLFBERH+T or +VLFBERHT+. The word "Ulfberht" is a Frankish personal name, possibly indicating the origin of the blades.