This is one of the most important sources for the works of Guillaume de Machaut, and thanks to the generosity of its owners, James E and Elizabeth J Ferrell, it has gone from being the most secret and enigmatic of the Machaut sources to the most accessible, and is the first to be produced in facsimile. It is a very large manuscript and the introduction and full-size facsimile have been produced in two volumes, introductory study (vol. 1: 232 pp. colour and b/w) and facsimile (vol. 2: 796 pp. Full colour) in a slipcase. The introduction is a multi-author work, with extensive new content and contextual study by Prof Lawrence Earp revealing hitherto unknown information about the provenance of the book in the library of the Duc du Berry together with a comprehensive history of its ownership up to the 20th century. Domenic Leo has provided a detailed discussion of the art-historical aspects of the book, and Carla Shapreau contributed an explosive chapter about the plunder and restitution of the manuscript during WWII. Christopher de Hamel, Fellow Librarian of Corpus Christi College, Cambridge has contributed a preface covering the recent history and present ownership of the book. Shipping costs are high (for non-UK customers only) due to the packed weight of the publication, which is over 7Kg.