In this truly innovative book, Babuji first explains Raja Yoga, the ancient system of transformation of human consciousness that originated in India. Babuji then introduces us to the efficacy of the modern-day practices of Sahaj Marg Raja Yoga, now also known as the Heartfulness Way.  As he describes the inner journey, and the regions we traverse in the process, we soon realise that this is no ordinary knowledge. He takes us beyond our current common understanding of science, philosophy, psychology and spirituality. Efficacy of Raja Yoga is essential reading for anyone interested in human evolution and personal transformation.  It is important, not the least because it shows us how the spiritual journey can be completed in this life itself.