Sectarian divisions within the Islamic world have long been misunderstood and misconstrued by the media and the general public. In this book, Adam R. Gaiser offers an accessible introduction to the main Muslim sects and schools, returning to the roots of the sectarian divide in the Medieval period. Beginning with the death of Muhammed and the ensuing debate over who would succeed him, Gaiser outlines how the umma (Muslim community) came to be divided...