Shaikh Mohammad Abdul Qadeer Siddiqui (1871-1962) (رحمتہ اللہ علیہ) is well known Sahih-ul-Aqeedah Sufi Shaikh of Ihsan. He was known as Barul Uloom (ocean of knowledge) during his lifetime in view of his contributions to Islamic teaching, particularly, theology. He was the Professor and Head of the Department of Islamic Studies at Othmania University in the erstwhile State of Hyderabad in Indian subcontinent. Shaikh has written many books, in addition to tafseer al-Quran titled ‘Tafseer-e-Siddiqui’ in Urdu. His most famous work is his treatise on Islamic Monotheism titled ‘Hikmat-e-Islamia. Many of his books, including Hikmat-e-Islamia, have been rendered into English by Shaikh Mir Asedullah Quadri.