Breath, the new science of a lost art
James Nestor, Penguin 2020.
Nestor, a science writer, explains in the introduction to Breath that he was alerted to the possibilities of breath-based health therapies (conventional and not) when his doctor sent him to a yoga breathing class to fix up his own chronic poor health. It worked, and sent him on an intermittent quest (he wrote another book along the way) to learn more.