Patrick Olivelle 
Dharma [PDF ebook] 

This is the first scholarly book devoted to the study of the term dharma with in the broad scope of Indian cultural and religious history. Most generalizations about Indian culture and religion upon close scrutiny turn out to be inaccurate. An exception undoubtedly is the term dharma. This term and the notions underlying it clearly constitute the most central feature of Indian civilization down the centuries, irrespective of linguistic, sectarian, or regional differences.