An in-depth exploration of the historical and religious background and context of the Kitab-i-Iqan, the Book of Certitude. Dr. Kourosh has compiled a wide range of useful contextual information that identifies more obscure theological, philosophical, and religious terms. He shows the connections to other religious texts and sacred scriptures, and provides more information about references to historical events. Dr. Kourosh also deciphers the references to other Writings of Baha’u’llah, as well as Writings of the Báb, ‘Abdú’l-Bahá, and Shoghi Effendi, which will help illuminate complex passages.