Njinga "the warrior queen"      

Njina, "The Warrior Queen," fought fiercely to keep her people from slavery. Yet she engaged in slave trading herself, performed human sacrifices and - some believed- even murdered her nephew, feasting on his heart. Was Njinga a terrifying tyrant or a freedom fighter?

This middle grade biography brings to life a dastardly dame who did whatetver it took to win and protect her kingdom.

From the series The Thinking Girl's Treasury of Dastardly Dames