There are several online book stores in India like Flipkart.com; Infebeam.com. Amazon.in; Scholars without borders. You can check book details including price in INR by way of searching through ISBN. Besides,the publishers too have their own sites like Sage, Routledge, Oxford/Cambridge Univ. Press etc. etc. where you can search for a for a book through ISBN. In International Publishers sites you may ask for INR specifically.