I see a lot of references to Western traditions of the occult in media (demons, alchemy, tarot, and all that), a few references to Eastern esotericism, and even some references to Native American mysticism (though not much beyond spirit animals/quests, sadly), but the only depictions of the occult in Africa I can think of involve just communing with the spirits of your ancestors. I'd look up more about it myself, but I really don't even know what to look for. So what's the history of the occult / esotericism / mysticism like for Africa? Are there any major resources to turn to for information about the occult in Africa?
I'm not sure about general surveys, and I'm also not sure about the distinction you're drawing between esotericism and traditional African religions, but I can provide two good case studies. E.E. Evans-Pritchard's film Witchcraft Among the Azande (Youtube link to full film) is a classic of ethnography (and therefore a bit dated), depicting divination and other practices among the Azande people of central Africa. The other is Steven Friedson's book Dancing Prophets: Musical Experience in Tumbuka Healing, which deals with divination within the frame of medical diagnosis among the Tumbuka people of Malawi. You might also be interested in West African secret societies (e.g. Poro, Sande).