Baha'i Faith, The: The Emerging Global Religion, by William S. Hatcher, Douglas Martin. (1985/2011) Overview of Bahá'í history and teachings, designed as an introductory textbook. Available in English or in Persian.
Minimalism: A Bridge between Classical Philosophy and the Bahá'í Revelation, by William S. Hatcher. (2004) An application of modern relational logic retroactively to problems in classical philosophy such as the existence and nature of God reveals answers which remarkably coincide with the answers found in the Bahá'í scriptures.