It is no surprise that despite all lofty talks about becoming a developed nation India is still deep immersed in ridiculous mysticism and superstitions. Books like this inject the poison of irrationality into our mind and thus in the name of promoting spiritual progress actually impede it. Spiritualism is what sheds off your ignorance to pursue true happiness in the material world, not what drives your mind away from the scientific reality and fills it with imbecile stories of supernatural phenomena. This book can appeal to only those who do not have any metaphysical awareness. Or if your mind is crippled by mystery mongering and dead beliefs it is an ideal read to further your intellectual decadence.
This book can be a usable handbook to those fraudulent miracle workers and faith healers. Any progressive individual would consign this book to the dustbin. If you have sincere interest in Yogic philosophy please read the works of genuine exponents like Vivekananda, Sri Aurobindo etc .