Start with high-confidence africa travel books, then narrow by subgenre or adjacent topics.
Crossing the Heart of Africa
Julian Smith
North of South
Shiva Naipaul
Journey to the Vanished City
Tudor Parfitt
Timbuktu School for Nomads
Nicholas Jubber
Mozambique
Philip Briggs
Ghana
Lonely Planet West Africa 9 9th Ed.
Anthony Ham, Stuart Butler
Ghana - Culture Smart!
Ian Utley
The Gardens of Mars
John Gimlette
Rwanda
Sudan
Sophie Ibbotson, Max Lovell-Hoare
Namibia - Culture Smart!
Sharri Whiting