I do not like to use terms such as "post-modern" while speaking of
African literature for two reasons: I do not understand really the meaning
of the word, and I do not like to use Western terminology unless I really
believe the novelists have used the term to describe what they are doing.
As for the question is there a local literature that speaks to local
people in West Africa, I can answer for the French part with a yes (I know
also about the English part, but that is not my specialty!). Although
university criticism speaks often of writers who live in exile such as
Mudimbe, Beyala, Liking, Marie N'Diaye, there are people such as Aminata
Sow Fall, M. Diabate,A Mamani who write for their people. It is often
a less fancy literature, but it express very well the "ordinary" African
soul. Evidently, the problem with that literature is that it has not
been translated in English! If you are interested, I could send you
a list of titles.