Explanation of Book of Monotheism [26] Suit sayers fortune teller and like: In these videos, Sh. Ibrahim Zidan explains the book of Monotheism which was authored by Sh. Muhammad ibn Abdul-Wahhab. This book gives a clear explanation of the Islamic creed which is the core of Islam, for the belief in Tawhid (monotheism) is the purpose for which Allah created both mankind and jinn.