Why include printed indexes without including the pages to which the indexes refer?
Although some indexes in academic books are poorly done and of little help to readers, a great many (especially in older books) are masterpieces that would give the reader a reasonably accurate indication of what the book is about and how much attention it gives to topic such-and-such. In addition, even if you are holding the book in your hand, a computerized version of its index can speed up your search for what the book says about the topic that interests you. This is true especially of books that include a lengthy index.
