Bruce Campbell’s book is the first single-authored treatment of medieval English agriculture at a national scale. Methodologically innovative, it deals comprehensively with the cultivation carried out by or for lords on their demesne farms, the documentation for which is more detailed and abundant than for any other agricultural group either during the medieval period or later. A context is thereby assured for all future work on the medieval and early modern agrarian economies. The book also makes a substantive contribution to on-going historical debates about the dimensions, chronology, and causes of medieval expansion, crisis, and contraction. Topics dealt with include the scale and composition of seigniorial estates, the geography of land-use, pastoral husbandry, arable husbandry, land productivity, levels of commercialisation, and the size of the population in relation to the consumption of food at any given time.