Produced in the 1940s, it is a topical index to the set of books titled Great Books of the Western World. Under each of some 3,000 topics or subjects, it lists references to pages within the set where that subject is discussed. Some of the references are to passages covering many pages, others are to key paragraphs or even parts of paragraphs. No more time is required to find them than is needed to take down the indicated volume and flip through its pages.
