There are many publications ITIL® available in the market. You can see the catalog and purchase the best one according to your need. You should keep in mind the fact that the best publication ITIL® is by OGC itself.
OGC (Office of Government Commerce) is responsible for launching the ITIL® framework and since then it has published ITIL® books. They are new publications as well as the revised versions that suit all kind of readers.
General publication ITIL® should be considered if you wish to know and learn about ITIL® as a whole. If you have substantial knowledge, then the OGC publication ITIL®, specific to different disciplines is considered to be extremely useful. ITIL® publications are also available on the websites in large number. You can enroll with specific publishers or you can access information that is available for free.