Anyway, I'm very interested in Oral Literature in Africa by Ruth H. Finnegan.
If it's blurb is anything to go by, we're all duty bound to download this free ebook and read it immediately:
"First published in 1970 by Oxford University Press, this classic study has been hailed as "the single most authoritative work on oral literature”. It traces the history of story-telling in Africa, and brings to life the diverse forms of creativity across the African continent. Author Ruth Finnegan is thought to have “almost single-handedly created the field of ethnography of language” with this book, and it continues to be a go-to text for anyone studying African culture."