If you haven’t used BookJetty before, then this is a perfect time to join and use it. This new feature will SMS you the book call number when you click on a SMS link on the book title you are looking for. This replaces the need to write it down on paper, which can be misplaced easily.
It’s definitely a cool feature that will be useful to lots of people. Though you might have the call number in your phone, you can still approach a librarian to help you locate a book quickly.