In this series, Dr. Saleh As-Saleh explains the Book of At-Tawheed written by Sh. Muhammad ibn Abdul-Wahhab. Dr. Saleh As-Saleh explains this book based on explanation of Sh. Ibn Uthaimin called the Beneficial Sayings Explaining the Book of At-Tawheed. The book of At-Tawheed shows the belief of Ahl As-Sunnah wa al-Jama'ah. It is a very important book shows the monotheism, its virtues and its nullifiers.