This book is a collection of 4 spiritual biographies written by Swami Satyananda Giri, eminent disciple of Swami Sriyukteshvar Giri. In this collection are the biographies of revered Yogiraj Shyama Charan Lahiri Mahasaya, as well as biographies of his disciples Yogacharya Shastri Mahasaya (Hansaswami Kebalananda) and Swami Sriyukteshvar Giriji Maharaj, as well as the biography of Paramahansa Yogananda entitled 'Yogananda Sanga."