- Sweden: An Illustrated History (Illustrated Histories (Hippocrene))
- Fighting Science: The Laws of Physics for Martial Artists
- Longsword and Saber: Swords and Swordsmen of Medieval and Modern Europe (Knives, Swords, and Bayonets: A World History of Edged Weapon Warfare)
- Norse Warfare: Unconventional Battle Strategies of the Ancient Viking
- Knife Defense (Five Books in One): Knife Training Methods and Techniques for Martial Artists