Book excerpt: This volume of the Annual Review for the Sociology of Religion adresses the challenges of the diversity and complexity of sociological approaches to Asian forms and dynamics of Asian or Asian-inpired ascetic ideas and practices. Eleven papers, written by scholars conducting researches in different geographic and cultural contexts, all contribute to enrich discussion on the relevance of sociological studies of Yoga, meditation and other ascetic techniques and traditions. Contributors are: Zuzana Bártová, Loïc Bawidamann, Jørn Borup, Sally SJ Brown, Ugo Dessì, Marianne Qvortrup Fibiger, Marc Lebranchu, Patrick S.D. McCartney, Lionel Obadia, Matteo Di Placido, Alexandros Sakellariou, João Paulo P. Silveira, and Rafael Walthert.