A richly illustrated study of one of the treasures of the British Library, MS Egerton 3277, a psalter and book of hours made for Humphrey de Bohun (d. 1373), the vastly wealthy earl of Hereford, Essex and Northampton who employed two or more illuminators to work on the manuscript in his own castle at Pleshey, Essex. The interaction between the Bohun patron and the Bohun artists is a major focus of the book. Along with a detailed commentary on the manuscript's more than 300 pictorial subjects from the books of Kings of the Old Testament, the Gospel of Luke, and the Acts of the Apostles, the book includes revised versions of twelve essays originally published between 2002 and 2011 linking the British Library manuscript with others illustrated by the same artists for members of the Bohun family in the second half of the fourteenth century.