Any history books about ancient Africa before the Tran Atlantic slave trade?

Question

except of Egypt. We already know about their history. 

I want a book tells the different nations in Africa. 

Update:

False, Kenny. There were written. They prefer orally written because of the griots

Answer 1

There are reports of the Songhai empire

Answer 2

"Oral" hustory comes through the mouth. 'Written" history comes through the hand.  "Orally written" history? Do you mean the writer taking down the story dictated by the speaker?

Answer 3

There are any number of books on the subject. I suggest you start by looking at the Wikipedia page "History of Africa" it also has an extensive list of references

Answer 4

There was no one able to write things down back then and that is a shame .

orally written ?