Since the Iranian Revolution in 1979, Article 24 of the Constitution of the Islamic Republic of Iran is assigned to the freedom of the press: “Publications and the press have freedom of expression except when it is detrimental to the fundamental principles of Islam or the rights of the public. The details of this exception will be specified by law”. As the article states, two major boundaries should govern the freedom of expression: no harm to the principles of Islam; and no harm to the rights of the public. The legal code or system of governing the press such as newspapers and magazines is detailed in the Press Law of 1979 ratified by the Council of the Islamic Revolution, the Press Law of 1986, and the Law on the Amendment of the Press Law of 2000 ratified by the Parliament. In the field of books, the details of the restrictions of freedom of expression have been defined by the acts issued by the Supreme Council of Cultural Revolution. The first regulation in this regard was approved by the council in 1988 and put into force by the Ministry of Culture and Islamic Guidance. The act was titled Goals, Policies, and Terms of Book Publishing. It was revised in 2010, nearly 20 years later, and the new title is the Resolution of the Goals, Policies, and Terms of Book Publishing. Prohibited Book Topics Article 4 of the resolution of 2010 introduces 28 book topics that may cause spreading profligate and disturbance in public rights, and thus are prohibited. The topics can be categorized under three main subtopics and each subtopic includes at least eight sub themes. The regulation requires the Ministry of Culture and Islamic Guidance fight back against these negative aspects of publishing books. As stated in the resolution, the following are some of the forbidden themes that must not appear in the contents of books. Religion and Morality 1. Propagation of disbelief, denial or distortion of Islamic principles and codes, distortion of the faces of the personalities of Islam who are respected, and distorting historical religious events that will ultimately lead to the denial of religious principles; 2. Insulting the sanctities of Islam and propagating against the teachings of the principles of Islam; 3. Propagating and promoting perverted, obsolete, distorted and heretic religions and sects; 4. Promoting superstition and undermining Islam; 5. Mentioning details of sexual intercourse, sins, vulgar