A. R. Nanda is a retired member of the Indian Administrative Service who served in senior roles including Secretary of the Ministry of Health and Family Welfare, Government of India. In The Eternal Sai Phenomenon, he explores the teachings and life of Shirdi Sai Baba through the framework of the Bhagavad Gita, analysing the Sai path across the traditions of karma yoga, jnana yoga, dhyana yoga, and bhakti yoga.