Swami Vivekananda mentions that one can understand, bring glory and develop our nation only by developing self confidence in one's self. That can only be achieved by understanding the Upanishads.
This particular Hindi Book is a beautiful exposition on the "Kaivalya Upanishad" by Swami Ishwaranada Giri.
The reader will immerse into Spiritual Values and will be lead into the Spiritual Path.