Tightly focused and circumscribed legal history of the various forms of feudalism. As stated in the intro, it has no intention to give an expansive account of feudal society in Europe or other feudalisms in Japan, Turkey, etc. Instead it is entirely focused on how one form of contract evolved, as well as all the related terminology. Ganshof provides a lot of interesting and lengthy quotations translated out of Latin of the formulas by which one man became the vassal of another. I enjoyed seeing how much of the oath of fealty consisted in promising not to murder, un-limb, kidnap, etc. the lord. The differences between the evolution in France, Germany, and England are prominently discussed; less attention given to Italy or Iberia. The inability of the lords to check the spreading influence of their vassals, as well as the (by the 13th century) growing ability of the bourgeois to purchase fiefs, leads to the end of the legal institution in its most recognizable form. Enjoyable and short, but dry.