This volume continues the systematic edition of the unpublished Bo-texts deposited in the Museum of Ancient Anatolian Civilizations in Ankara. As in previous volumes, the text fragments are presented in both photographs and transliterations, with succinct philological notes explaining particular forms and relevant text variants. Several direct joins with other fragments were observed during the preparation of this volume, and the combined texts are presented here either through new photographs taken of the physically joined fragments or, where the fragments are dispersed among different museums, through digital image processing. The fragments dealt with here are mostly of a religious nature-predominantly rituals, festivals, cult inventories, and oracular texts. Two fragments are additions to the corpus of important historical compositions. A Kamruepa myth with a description of a volcanic eruption, a magical ritual concerning the West Anatolian foe Kukkulli, and festival instructions or preparations of Au?ani are also worth mentioning. A ?edammu myth fragment and several non-Hittite compositions (vocabulary, medical text, omen) represent further text varieties. Each text edition is accompanied, wherever possible, by information about its assignment to a Hittite text or text genre, the date of the composition, the fragment's measurements, and previous bibliography. The edition of these fragments has been long awaited by Hittitologists and has become an essential element in the history of Hittitology over the past thirty-five years.