- Ameen Rihani and the Unity of Religion: The Politics of Time and the Politics of Eternity, by Suheil Badi Bushrui (published as Suheil Bushrui) (2014). — Overview of the life and thought of a Lebanese-American writer, intellectual, and political activist...
- Bahá'í World, The: Volume 08 (1938-1940), National Spiritual Assembly of the Bahá'ís of the United States and Canada, comp. (1942). — Periodic volumes that survey the global activities and major achievements of the Faith.
- Bahá'í World, The: Volume 09 (1940-1944), National Spiritual Assembly of the Bahá'ís of the United States and Canada, comp. (1945). — Periodic volumes that survey the global activities and major achievements of the Faith.
- Bios of Mihraban Rustam Bulbulan and Kaushal Kishore Bhargava, by Dipchand Khianra (1986). — "One Kind Deed," a bio of Mihraban Rustam Bulbulan, and "Kaushal Kishore Bhargava: An Appreciation."
- Early History of the Bahá'í Community in Boston, Massachusetts, by Anise Rideout (n.d.). — Overview of history 1900-1940. Includes early translations of some 2-dozen tablets of Abdu'l-Baha.
- Guardian's Wartime Travels, The, by Harry Liedtke (2016). — Brief chronology of world events 1938-1940 juxtaposed with Shoghi Effendi's travels in 1940, when he...
- Heroes of God: History of the Bahá'í Faith in Ecuador, 1940-1979, by Helen Bassett Hornby (1984). — First book (in English) on the first four decades of the Faith in Ecuador.
- Information for Bahá'ís called to fill out the Questionnaire on military duty under the Draft Act 1940, by National Spiritual Assembly of the Bahá'ís of the United States (1940-09-17). — Summary of grounds for seeking exemption from combatant duty.
- Localities where Bahá'ís live (world, 1940), by Author unknown (1945).
- Searching for May Maxwell: Bahá'í Millennial Feminism, Transformative Identity and Globalism in the New World Order, by Selena M. Crosson (2013-06). — On forces influencing and shaping womens' roles in early Baha’i culture, 1898-1940. A group of Wes...
- Teaching regions of the United States and Canada (1940), by Author unknown (1945).
- Trial and Triumph: The Origins of the Bahá'í Faith in Black America, by Jerome Green (2004). — Focusing on a period between 1890 and 1940, this work addresses how Black America first encountered ...
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