Hazrat Inayat Khan (1882-1927) was born in India and is credited with having brought Sufism, the mystical tradition of Islam, to the West. Rassa Shastra, recently re-released, is an honest and frank discussion of sex and relationships, which form the sacred purpose of "true union" - one of the Sufi keys to perfection. This is a fascinating book and serves as an excellent introduction to Sufism, as well as providing fascinating insights into Sex, Marriage, Beauty, Polygamy and a variety of other relationship oriented subjects.