Book excerpt: This volume is the first book to focus specifically on the topic of comparative glossing. It brings together new research on glossing practices from traditions in both the West and East Asia, with a focus on Japan. It also touches on the relation between glossing in the medieval manuscript tradition and the modern linguistic use of the gloss. Its purpose is to present a sample of the most recent studies on glossing as it is practiced across very different parts of the world, highlighting the many shared features found across space and time. Glosses take many forms and serve numerous functions according to when and where they are produced. They constitute a cross-cultural phenomenon anchored in language, and are the manifestation of hermeneutic processes involved in the transfer of knowledge from one linguistic area to another. Glosses are an integral part of all the stages of this transfer, which is characterized by the necessity to decode and explain the message, encompassing basic grammatical commentary and wider exegetical discussions.