The Kitáb-i-Íqán (Persian: كتاب ايقان, Arabic: كتاب الإيقان "Book of Certitude") is a book written by Baháʼu'lláh, the founder of the Baháʼí Faith. It is the religion's primary theological work and one of many texts that Baháʼís hold sacred. It is considered the second most important book in the Baháʼí writings, with the most important being the Kitáb-i-Aqdas. One Baháʼí scholar states that it can be regarded as the "most influential Quran commentary in Persian outside the Muslim world," because of its international audience. The Kitáb-i-Íqán is sometimes referred to as the Book of Íqán or simply The Íqán. Source: Wikipedia (en)