Scholars have an inordinate respect for long books, and have a terrible rancune against those that attempt to cheat on them. They cannot bear to imagine that short-cuts are possible, that specialism is not an inevitability, that learning need not be stoically endured. They cannot bear writers allegro, and when they read such texts-and even pretend to revere them-the result is (this is not a description without generosity) 'unappetizing'.