Karma Yoga (The Yoga of action) is a book of lectures by Swami Vivekananda, as transcribed by Joseph Josiah Goodwin. Swami Vivekananda delivered a number of lectures in his rented rooms at 228 W 39th Street in New York City from December 1895 to January 1896. In 1895 friends and supporters of Swami Vivekananda hired Goodwin, a professional stenographer, who transcribed some of the lectures which were later published as this book. Goodwin later became a follower of Vivekananda. The main topic of the book was Karma (work) and Karma Yoga. Swami Vivekananda discussed the concept of Karma in the Bhagavada Gita. Swami Vivekananda described Karma Yoga as a mental discipline that allows a person to carry out his/her duties as a service to the entire world, as a path to enlightenment.