Birth of Apostle: very little is known about his birth
Sanders, E. P. Paul: A Very Short Introduction. Oxford University Press, June 7, 2001.
Writings of Apostle
Braunch, Manfred. Hard Sayings of Paul (Hard Sayings Series the Hard Sayings). IVP Academic, June 22, 1989.
Travel: Apostle travelled to various places such as Jerusalem, Damascus, Arabia, Syria, Caesarea. The references below help understand his travel.
http://www.whatchristianswanttoknow.com/apostle-peter-biography-timeline-life-and-death/#ixzz33e0zRqcY
Wellman, Jack. Apostle Peter Biography: Timeline, Life, and Death. November 12, 2011
Hengel, Martin. Paul between Damascus and Antioch: The Unknown Years. Westminster John Knox Press April 1, 1997
Collection of his letters: His Writings
J.D. Douglas, General Editor. The International Dictionary of the Christian Church. Zondervan Publishing House, ...