The Bhaktivedanta Book Trust (BBT) is the world's largest publisher of books concerning Krishna and the philosophy, religion, and culture of the Gaudiya Vaishnava tradition of India . It was established in 1972 by A. C. Bhaktivedanta Swami Prabhupada, founder-acharya of the International Society for Krishna Consciousness (ISKCON). The BBT is the publisher for his books and for books by other authors. It also publishes the magazine Back to Godhead in English, Hindi, Marathi, Bengali, Italian, Hungarian, and other languages. The BBT is a nonprofit organization, independent of ISKCON, and supplies books both to ISKCON and to the book trade in general.