Hey there. Thanks for your support. I don't know of any books on breathwork. I've just experienced many different forms in yoga and breathing classes and workshops, and from friends and watching videos online. I created a Udemy course that teaches 4 types of breathing if you're interested in checking it out...
https://www.udemy.com/master-your-mind-emotions-in-21-days/
Or I would recommend looking up some techniques online. 🙏🙏🙏
RE: You MUST Step Out of Your Comfort Zone in Order to GROW! -- My (not-so-short) story: From unhappy highschool math teacher, to ecstatic creator of my dreams!