This study sheds light on a drama that has gone almost unnoticed: the trafficking of blacks in Africa by the Arab-Muslim world. This trafficking involved seventeen million victims killed, castrated or enslaved, for more than thirteen centuries without interruption. The raids were forced to cross the desert on foot to reach the Maghreb, Egypt or the Arabian Peninsula via Zanzibar, by boat ... However, this slave trade was minimized, unlike the Western trade to America. Why ? Because only conversion to Islam made it possible to escape slavery, but it did not spare blacks. However, nowadays most of Africa has become Muslim, hence a form of religious brotherhood between the "white" side and the "black" side of the continent, and a common desire to "veil" this genocide. A controversial and courageous book.