Odu Ifá
The corpus is memorised, not written — what a reader can buy in print is a twentieth-century transcription from named diviners, and which verses count as canonical genuinely differs by lineage and by country. UNESCO recognised the tradition formally in 2005.
William Bascom, Ifa Divination (1969), recording verses from named diviners in Ife and Meko
A vast Yoruba divinatory corpus of 256 chapters, held orally by trained diviners and comparable in scale to the Chinese I Ching.