'Assimilating so many centuries, countries and communities together, especially following the invasions by the Mongols and the Crusaders is a daunting proposition. Egger has accomplished it and to a high quality. Information on Sub-Saharan Africa and Southeast Asia, often ignored or found on the margins in historical accounts, is certainly comprehensive here. Students, as well as a general readership, will be able to relate to the various phases, challenges, and dynamics of Muslim societies.'Iftikhar H. Malik, Bath Spa University, UK