Good book for a spiritual seeker. Shi-va is presented as primeval emptiness existing from the beginning of creation and as adiyogi who walked the earth and mastered the art of liberation through yoga. Sadhguru weaves Science and philosophy like the Strands of a thread. I felt reading this book is like a taking first step towards pursuing liberation. Reader might feel like author is criss crossing between the facts and myths through out the book yet one will feel like there is some sense to what sadhguru says. Book gives glimpses of adiyogi through the eyes of sadhguru. Shiva cannot be described in a single volume. all the words and languages combinedly cannot describe him. One should experience him.