This bibliography of works on medieval communication offers a survey of work in a field of study which, from the 1960s onwards, has seen an ever-increasing number of monographs, collections of miscellanies and articles in learned journals being published every year. It provides a guide to this astonishing output by offering a list of more than 6.700 publications under sixteen headings. Because of the overlap of these headings, a comprehensive Index of subjects, place names and personal names is provided, which will allow the user to quickly find publications relevant to his research. A short Introduction precedes the bibliography. Progress in the field of study over the past two decades is outlined, with attention to those recent developments which have proved the most productive. At the same time, something is said about the growing insights which have led the bibliography's organisation to be changed substantially since its previous edition in 1999, which already numbered 1.580 items. Not only the more than fourfold increase in the number of items made a new edition necessary therefore, but also new ideas about the best ways of organising the knowledge that is to be gained from the contents of studies of medieval communication.