This volume continues the systematic edition of the unpublished Bo-texts deposited in the Museum of Ancient Anatolian Civilizations in Ankara.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. Direct joins with fragments in other museums are shown through digital image processing. Most of the fragments dealt with here are of a religious nature—predominantly ritual, festival, cult inventory, and oracular texts. Two fragments provide additions to the genre of Old Hittite historical texts; a well-preserved tablet exhibiting striking Old Hittite philological features concerns the cult of Zippalanda; and other fragments with the Gurparanza myth, Hattian songs, and prayers 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 composition, the fragment's measurements, and previous bibliography.