Drawing on thousands of years of medical texts and recent cutting-edge studies in pulmonology, psychology, biochemistry, and human physiology, journalist James Nestor questions the conventional wisdom of what we thought we knew about our most basic biological function, breathing. Nestor tracks down men and women exploring the science behind ancient breathing practices like Pranayama, Sudarshan Kriya, and Tummo and teams up with pulmonary specialists to scientifically test long-held beliefs about how we breathe. His inquiry leads to the understanding that breathing is in many ways as important as what we eat, how much we exercise, or whatever genes we’ve inherited.