Start with high-confidence historical africa books, then narrow by subgenre or adjacent topics.
Buried Beneath the Baobab Tree
Adaobi Tricia Nwaubani, Viviana Mazza
Freewater (newbery & Coretta Scott King Award Winner)
Amina Luqman-Dawson
The Door of No Return
Kwame Alexander
My Name Is Not Angelica
Scott O'Dell, Scott O'Dell
Homegoing
Yaa Gyasi
Copper Sun
Sharon M. Draper
Cane Warriors
Alex Wheatle
