The Book of Monotheism Kit ā b ut-Tawḥeed: The Basis of Islam and the Reality of Monotheism, occupies a unique place amongst contemporary Islamic works. Volume 1 is now published and is the first book in the series. The book is the magnum opus of Professor Muḥammad ibn Abdullah al-Mas’ari (may Allah preserve him), and has been rendered into English for the first time. The work represents an in-depth study into the very root origins of Islam, the essential nature of Tawḥeed . Coupled with that, it tackles head on not only the age-old problem concerning the precise nature of worship ( ibādah ) and polytheism ( shirk ), but also how these topics correspond to contemporary issues like ruling, governance and allegiance. Liberated from confused ill-disciplined divisions, primacy throughout the work is given to the original textual sources: the Qur’an and the Prophetic Sunnah . By returning to the original textual sources many of the phantasms that have plagued Isl...