Reading has always been an inseparable part of people’s daily life. For some people, however, picking the right book to read is always a headache. In order to solve that problem, we designed a book recommendation system called Nextbook. Nextbook is a rule-based expert system implemented with CLIPS. It will simply ask you a few questions and, based your answer, provide a book list that is likely to interest you. Moreover, Nextbook will also provide other readers’ reviews on the selected books for your reference.