Abstract: A modular book which is uniquely adapted for a particular professor's course is formed by preassembling a plurality of different potential individually wrapped modules or chapters relating to a subject. Only selected ones of these modules are combined together and packaged along with a plastic spine protectors, front and back covers, and posts. The spine protector and posts are selected from a plurality of different spine protectors and posts so that they correspond in width to the combined thickness of the individual modules. These can all be boxed in a rectangular-shaped box that is easily stacked in a book store. Thus, a professor who is only interested in teaching a course relating to three topics can have a course book prepared which only includes those three modules. Another professor who wants five different topics to be taught in his course can have a course book uniquely prepared with only those five modules.