This book, a compilation of writings written by Swami Bhajanananda, presents in a concise form the lives and teachings of Sri Ramakrishna, Sri Sarada Devi and Swami Vivekananda. It also presents in a nutshell a brief biographical sketch of monastic disciples, lay disciples and women disciples of Sri Ramakrishna. The volume, in addition, provides a short history of Ramakrishna Math and Mission, its ideology, emblem and a note on the Ramakrishna movement.