The greatest book on Vedic concepts – Rigvedadibhashyabhumika or Introduction to Vedas in Hindi is available for download here. This version is in a small size editable pdf format for easy reading on computer and easy circulation.
The Hindi text may vary a bit from original concepts of Swami Dayanand Saraswati – the author of the book – due to various reasons like editing errors and typos. (The book was written 135 years ago). But despite that, it provides an insight into Vedic concepts that no other book can match. Must read for all willing to transform their lives and the world!
Note: This version of of the book may have some errors and omissions, however the key essence is retained. For serious study and reference purpose, we strongly recommend a hard copy of Rigvedadibhashyabhumika published by Ram Lal Kapoor Trust, Sonipat edited by Pt Yudhishthir Meemansak. You can inquire about it from www.vedicbooks.com.
Please also review Satyarth Prakash to get a fuller understanding of Vedic concepts.