This book, authored by Sri Anna N. Subramanian, the well-known author and translator, explains the concept and the different kinds of Tapas as described in the Valmiki Ramayana. This book will help the readers to understand the idea of tapas and dharma as embodied in the lives of great Avatars, and help them to incorporate in their own lives.
The important thing is how much less you think of the body, of yourself as matter -- as dead, dull, insentient matter; how much more you think of yourself as shining immortal being. The more you think of yourself as spirit, the more eager you will be to be absolutely free from matter, body and senses. This is the intense desire to be free.
-Swami Vivekananda