This book is about Abu Bakr, the first Caliph to rule the world of Islam after the Prophet Muhammad. More important than his achievements as a state leader was his close companionship with Prophet Muhammad, a relationship that earned him the name al Siddiq. He was the only Companion who was privileged to ride alongside the Prophet Muhammad in his great migration to Madina, a turning point in the history of Islam. This book analyzes his life, his relationship with the Prophet, and his unique role in the birth period of Islam.