Tuberculosis has been entwined with humanity for millennia. Once romanticized as a malady of poets, today tuberculosis is seen as a disease of poverty that walks the trails of injustice and inequity we blazed for it. In 2019, John Green met Henry Reider, a young tuberculosis patient at Lakka Government Hospital in Sierra Leone. In this book, John tells Henry's story, woven through with the scientific and social histories of how tuberculosis has shaped our world, and how our choices will shape the future of tuberculosis.