If you are among our many users who regularly search for early editions only to receive search results that are swamped with modern reprints then our first new feature should be of great interest. We have now added a check box that allows you to exclude from your search results all books which have been assigned an ISBN number.
The general use of ISBN numbers did not begin until the 1970s, so it is fairly safe to assume that any book which has been assigned one will not have been printed before then. Most online second-hand booksellers are careful to include ISBNs, when known, as part of their descriptions. By checking the box marked “No ISBNs” you can thus filter out a large number of modern reprints of older titles.
The filtering is not complete, since there are still some booksellers who do not use ISBN when cataloging their books, but the number that can be eliminated in this way is substantial. When used along with our “No PODs” check box you should be able to avoid much of the annoying chaff that would otherwise clutter your searches for old and rare books. And we have also updated the Search Manager to make use of this new filter, so if you are using Libribot you can also update your wants to reduce the number of unwanted matches.