The youngest of the world religions and the second most widespread after Christianity, the Baha'i Faith is well known for its belief in the oneness of all religions. In this clear, readable, and informative guide, Momen provides a vibrant introduction to all aspects of this fast-expanding faith, which now has over 5.5 million adherents. From its teachings on the spiritual development of the individual to the belief in the need for world peace, Momen's comprehensive study gives anyone interested in the contemporary religious landscape an authoritative insight into this 150-year old tradition, whose spiritual and social teachings are so much in tune with the concerns of today.