Start with high-confidence southern africa travel books, then narrow by subgenre or adjacent topics.
Cry of the Kalahari
Mark Owens, Delia Owens
The Black Rhinos of Namibia
Rick Bass
Mozambique
Philip Briggs
Senegal
Sean Connolly
Ghana
Lonely Planet West Africa 9 9th Ed.
Anthony Ham, Stuart Butler
Lonely Planet Kenya 11 11th Ed.
Nanjala Nyabola, Shawn Duthie
Lonely Planet Tanzania 8 8th Ed.
Anthony Ham
Botswana - Culture Smart!
Culture Smart!, Michael Main
Rwanda
Botswana Safari Guide
Chris McIntyre, Susie McIntyre
Sudan
Sophie Ibbotson, Max Lovell-Hoare
Namibia - Culture Smart!
Sharri Whiting
Malawi - Culture Smart!
Kondwani Bell Munthali
The Safari Companion
Richard D. Estes