I read this for teacher training and will be coming back to it regularly in the future. The introduction provides a quick yet comprehensive overview to yogic philosophy while the rest is a thorough breakdown of the main postures, along with modifications and uses for props. The spiritual side of yoga is new for me. Or at least formal instruction on the spiritual side is new to me. We're using this text as kind of a guide book for our weekly discussions and, not surprisingly, it's making my entire practice much richer.