Contact
Last updated 19 October 2026
For anything about an order, a download, a refund or a free book, write to:
To help us answer quickly
- The email address you used when ordering.
- The book's title.
- The order or copy ID, if you have it. The copy ID is printed on the first page of your copy, in the form 1A2B-3C4D-5E6F.
The seller
Quantpragna LLP
Villa 46, RBD Stillwaters
Silver County Road, HSR Extension
Haralur, Bangalore 560102
Karnataka, India
The books are written by Dr. Gnana Prakash Neel and sold by Quantpragna LLP.