Book excerpt: The Glossa Ordinaria, the medieval glossed Bible first printed in 1480/81, has been a rich source of biblical commentary for centuries. Circulated first in manuscript, the text is the Latin Vulgate Bible of St. Jerome with patristic commentary both in the margins and within the text itself. This study, the first of its kind, introduces the reader to the Glossa Ordinaria both historically and through the lens of contemporary hypertext theory, arguing that the Glossa Ordinaria is a hypertext of the mind. By application of ancient, medieval and modern theories, this study encourages the reader to engage the Glossa Ordinaria in new and exciting ways. This book serves both as primer on the Glossa Ordinaria and examination of the text in light of modern theories.