Africans: The History of a continent by John Iliffe
The author dares to acknowledge the fact that Europeans (gasp) did something good, saving Africa from its endless cycle of famine and epidemics by introducing new world crops (maize, potatoes, cassava) that became staple food in the whole continent, and western medicine.
The concept of white devil becoming widespread during the slave trade age. African masses began to believe that people kidnapped into slavery were turned into luxury items. Gunpower being crushed bones, wine being fermented blood, leather boots being human skin, and so on.
Previously mentioned Kongo, Kilwa, Zanzibar, Mali and Ethiopia as original, independent African powers that flourished before western contact.
Overall it's the perfect book to demolish we wuz kangs ideology.