[Koha] Bookshelf Feature

Good Afternoon All Can someone tell me how the bookshelf feature is suppose to work? Whenever I select a title in OPAC at the bottom of the page it gives me a Left and Right arrow with the title in the middle but if I select one of the arrow the feature disappears? I think I get the idea of it but not sure if I need to set anything else up to have it work write. Thanks Ed Edward J. Roche Network Administrator Solanco School District 717.786.2151 x2437 "At the End of the Day, Did You Play to Win or Not to Lose?"