A strong case can be made out, I am convinced, for the proposition that many librarians are obsessed with classification for the sake of classification. With rare exceptions, investigation has revealed, library users are totally indifferent to classification, so long as it does not actually interfere with their finding the books they want. If they have thought about the matter at all and were given a choice, the readers would vote for the utmost possible simplicity in whatever scheme of classification is adopted. Logical sequences, a fetish worshipped by numerous classifiers, mean little to all except an occasional professor of philosophy. Though I would not argue for it, there is a good deal to be said for the accession order in...