This room holds the principal works of Shoghi Effendi, ʻAbdu'l-Bahá's grandson and the Guardian of the Bahá'í Faith from 1921 to 1957, who wrote in English. They include God Passes By, his history of the Faith's first century, and the long letters gathered as The World Order of Bahá'u'lláh, The Advent of Divine Justice and The Promised Day Is Come. Bahá'ís regard his interpretations as authoritative. Each page names its edition and quotes the Bahá'í International Community's terms of use under which it appears.