Shiavault - a Vault of Shia Islamic Books At-Tawhid or Monotheism Epub (E-Readers) Mobi (Kindle) A book that delves into the several dimensions and depths of Tawhid (Oneness of God): the central and core concept of Islam. Starting from the basic definitions, it then moves onto how one's life and existence revolve around Tawhid. Preface Part 1: At-Tawhid in the Value System of Islam Part 2: At-Tawhid In the Ideological System of Islam