Craig Martin 
Critical Introduction to the Study of Religion [PDF ebook] 

A Critical Introduction to the Study of Religion introduces the key concepts and theories from religious studies that are necessary for a full understanding of the complex ways in which religious and cultural institutions and traditions influence society. This book provides readers with an arsenal of critical concepts for studying religious ideologies, practices, and communities. This edition has been thoroughly revised and now includes a new chapter on "Belief" and a rewritten chapter on "Essentialism, " and has been restructured to clearly emphasize key topics including: problems with the concepts of "religion" and "belief systems;" functionalism and classification; essentialism, socialization, and habitus; and legitimation, authority, and authenticity All ideas and theories are clearly illustrated, with contemporary and engaging examples and case studies throughout. It’s an essential text for all students approaching the subject area for the first time.