Karma yoga is a deep subject of Indian philosophy. If we read this Karma Yoga book carefully, we will have an easy clear idea about what Karma Yoga is and why it is necessary in our life and how we can practice it in our own life. There are various effective teachings and philosophies about Karma Yoga from Sri Ramakrishna, Srima Sarada Devi, Swami Vivekananda and various great men. The advice is compiled here.