Katrina Hazzard-Donald’s Mojo Workin’: The Old African American Hoodoo System is a rich, academic study of Hoodoo, tracing the religion’s root back to the tribal people of Africa who were forcibly brought to America as slaves. They relied on their religious belief system, including charms and mojo bags to (successfully) protect them from often cruel masters. She follows Hoodoo through watershed changes in the cultural landscape of America which wrought significant changes in African American culture, society, family structure, and religion.