"Book of Monotheism" ( "Kitab al-Tawhid") is one of the most famous works of Imam Muhammad ibn 'Abd al-Wahhab al-Tamimi. The book contains the sacred texts of the Koran and the Sunnah, which clarify the meaning of the worship of Allah alone and warn of slaves from any actions, which are either completely contrary to monotheism, or undermine its perfection. Because of this it has become a banner in the hands of the followers of monotheism and was the irrefutable argument against the heretics and misguided.