Book excerpt: John Herlihy takes readers on a journey of understanding to the heart of Islam, the world's fastest growing religion. Weaving details of Islam's central beliefs and practices--its Five Pillars--with intimate autobiographical details of his more than thirty years in the religion, Herlihy provides readers with an insightful glimpse into a religion that currently claims more than one billion adherents and yet remains so often misunderstood in the West. In Wisdom's Journey Herlihy speaks openly about his conversion to Islam and intimately retells his moving experiences while performing the pilgrimag.