The Importance of the subject of tawhid (Monotheism) is made sufficiency clear by considering facts such as:

1) It is the very purpose of the creation of jinn and mankind.
2) Allah does not forgive those who die in a state of associating partners to Him,, weather in His Lordship, Names & Attributes and or His right to be worshipped alone.
3) Most people do not believe in Allah accept that they also have polytheism present with them, a phenomenon which Allah Him Self informs us of in His Book.

This work is a summary of the book Al-Qawl Al-Mufid Sharh Kitab At-Tawhid by Shaykh Muhammad Ibn Salih Al-Uthaymin. Despite its brevity, it is comprehensive in elucidating the issues related to Tawhid and its antithesis: shirk (polytheism). It also contains points unmentioned in all of the existing books on tawhid (in the English language). I have included the grading of all the ahadith contained in the original based on the checking of scholars of Ahadith such as Shaykh Muhammad Nasir Ad-Din Al-Albani and Abdul Qadir Arnaut and an appendix outlining all the ahadith and other narrations that have been deemed unauthentic by the scholars.