The classic work of the great scholar of Najd, Shaykh al-Islaam Muhammad ibn 'Abdil-Wahhaab (may Allaah have Mercy on him), Nawaaqidh al-Islaam, "The Things that Nullify One's Islaam," is explained by the virtuous shaykh, Saalih al-Fawzaan (may Allaah preserve him), passage by passage, in a way that will help the Muslims grasp a clear understanding of the nature of the things that nullify one's Islaam and its manifestations.