Baháʼí literature covers a variety of topics and forms, including scripture and inspiration, interpretation, history and biography, introduction and study materials, and apologia. Sometimes considerable overlap between these forms can be observed in a particular text. The "canonical texts" are the writings of the Báb, Baháʼu'lláh, ʻAbdu'l-Bahá, Shoghi Effendi and the Universal House of Justice, and the authenticated talks of ʻAbdu'l-Bahá. The writings of the Báb and Baháʼu'lláh are regarded as divine revelation, the writings and talks of ʻAbdu'l-Bahá and the writings of Shoghi Effendi as authoritative interpretation, and those of the Universal House of Justice as authoritative legislation and elucidation. Some measure of divine guidance is assumed for all of these texts. The Baháʼí Faith relies extensively on its literature. Literacy is strongly encouraged so that believers may read the texts for themselves. In addition, doctrinal questions are routinely addressed by returning to primary works. Many of the religion's early works took the form of letters to individuals or communities. These are termed tablets and have been collected into various folios by Baháʼís over time. Today, the Universal House of Justice still uses letters as a primary method of communication. Source: Wikipedia (en)