Legacy of Verse 42 of the Kitáb-i-Aqdas, The, by Gerald C. Keil (2021). — Explores the circumstances under which a reading of Verse 42 which indicates that the line of Aghsan...
Lights of Guidance: A Bahá'í Reference File, by Bahá'u'lláh, Abdu'l-Bahá, Shoghi Effendi, Universal House of Justice, Helen Bassett Hornby, comp. (1988). — The classic Baha'i reference book. This is its first online edition.