This text provides an introduction to the life of the founder of Wahhabism and an in-depth analysis of the beliefs of Wahhabi School of thought in the light of the Qur’an, Ahadith (traditions), and logical reasoning, proving that the Wahhabism is a deviant sect and has nothing to do with the teachings of Islam. The author explains in detail the Islamic concepts of shirk (polytheism), construction of graves and reciting ziyarat (visitation) of Prophets, Saints and divine personalities (Awliya’ Allah), Tawassul (recourse) to the divine personalities, the commemoration of birth and death anniversaries of divine personalities, seeking Shifa’ (benediction) from the traces of divine personalities, seeking help from divine personalities during their life and from their souls after their death, seeking Shafa’a (intercession) from divine personalities for the forgiveness of sins and making Nadhr (vow) to the beloved ones of God. The appendices provide a detailed list of books and research papers written by prominent Muslim (Sunni and Shia) scholars and Western intellectuals on the critic and rebuttal of Wahhabism.