In 1951, a poor African American tobacco farmer named Henrietta Lacks visited Johns Hopkins Hospital complaining of a "knot" in her womb. Doctors took a biopsy of her aggressive cervical cancer without her knowledge or consent. Henrietta died months later, but her cells did something no human cells had ever done before in a lab: they didn't die. They multiplied. "The Immortal Woman" tells the story of the "HeLa" cell line, the first immortal human cells ever grown in culture. These cells became the workhorse of modern biology, essential for developing the polio vaccine, cancer treatments, and gene mapping. They have been bought and sold by the billions. Yet for decades, Henrietta's family lived in poverty, unable to afford health insurance, completely unaware that a part of their mother was alive and fueling a multi-billion dollar industry. This book is a powerful exploration of medical ethics, race, and the ownership of our own bodies. It honors the woman behind the microscope slide.