This book gives the details on not only the history (with biographical details) of extremist Wahhabism, but also its ideological differences from moderate Wahhabism and the scholars and works which have been published and widely discussed within Mecca by moderate Wahhabis, refuting extremist Wahhabism. A detailed account of Shia beliefs and practices and their defense is also provided. This book (166 pages) is a good, quick read to understand both the depth of the issues at once as well as the recent changes to counter extremist Wahhabism by both the government and scholars of Saudi Arabia.