Okorafor, Nnedi. She who knows (Series) #2

DAW book collectors #1981

"Set in the universe Africanfuturist luminary Nnedi Okorafor first introduced in the World Fantasy Award-winning Who Fears Death, One Way Witch is the second in the She Who Knows trilogy"--

In this tale of grief, magic, and resilience, Najeeba--once a kponyungo, now a grieving mother--seeks the forbidden Mystic Points to face a rising evil. Haunted by loss and driven by purpose, she turns to her daughter Onyesonwu's former teacher, Aro, to harness the deep sorcery she once walked away from. To forge her future, Najeeba must confront the buried truths of her past