This room holds the writings of Bahá'u'lláh, which Bahá'ís regard as revelation. They include the Kitáb-i-Aqdas, the "Most Holy Book" of laws and ordinances; the Kitáb-i-Íqán, the "Book of Certitude" on the nature of revelation; the Hidden Words and the Seven Valleys, his best-known mystical works; the tablets to the kings and rulers of his time; the Epistle to the Son of the Wolf, his last major work; and the collections of his prayers and passages compiled and translated by Shoghi Effendi. Each page names its edition and quotes the Bahá'í International Community's terms of use under which it appears.