In his works, Sheikh-ul-Islam has not only elaborated the Qur'an and Sunnah, but has also uprooted the polytheistic views and has made a hard struggle to eradicate the heresies and accretions. His writing Kitab at-Tauhid is one of the best books on the subject of Tauhid (Islamic Monotheism) and ranks high in authenticity. Till date it has gone through various publications; and had been the means for guidance of the millions of people throughout the world; by taking them out of the darkness of polytheism and error.