Start with high-confidence south africa history books, then narrow by subgenre or adjacent topics.
Playing the Enemy
John Carlin
South Africa's Weapons of Mass Destruction
Helen E. Purkitt, Stephen F. Burgess
Long Walk to Freedom
Nelson Mandela
Slavery by Any Other Name
Eric Allina
'this Matter of Women Is Getting Very Bad'
Marc Epprecht
The Lusaka Years
Hugh Macmillan