The Oxford Guides to Chaucer are written to summarize what is known about his works and offer interpretations based on recent advances in both historical knowledge and theoretical understanding. Following the successful Oxford Guide to Chaucer: The Canterbury Tales, this volume looks in depth at Chaucer's masterwork. The guide includes the fullest and most convenient account of Chaucer's use of sources, analysis of the poem's genre, and a readable commentary on all aspects of its themes, structure, and style. The most comprehensive guide to the poem yet written, this work will be invaluable to all scholars and serious students.