Appear yearly. Since the earliest days of Llewellyn Publications more than a century ago, we have published books dedicated to information for the specific year of publication. Over the decades, this has expanded from strictly astrological books such as the Daily Planetary Guide, the Sun Sign Book, and the Moon Sign Book, to include datebooks, almanacs, and calendars focused on magic, Tarot, Witchcraft and Wicca, and herbalism, as well as those sharing astrological advice. Because each is filled with original articles and information from new and well-known writers, and as they are only available for one year, they often become collectables and rapidly sell out.