The book begins with the heralding of Islam, its humane message, the unexcelled personality of the prophet and altruistic devotion of the caliphs. It takes up the Saracenic conquests from 635 AD when the message of Islam started reaching many near and distant lands. It enlightened Damascus and Jerusalem and reached Tripoli and Rhodes. Cyprus, Persia and the Indus valley were won in quick succession. And the North African coasts, Rome and Andalusia fell in no time.