The Pergamum Collection publishes books history has long forgotten. We transcribe books by hand that are now hard to find and out of print.

Ernest Henderson's History of Germany in the Middle Ages is an expansive history of from the fall of the Western Roman Empire until the end of the Middle Ages.

• The Life of Charlemagne
• The History of the Crusades Volume 2
• The History of the Crusades Volume 3
• The History of the Crusades Volume 1
• History of the Middle Ages