I'm also reading Abraham by Bruce Feiler. In it, he seeks to portray Abraham, the father of the Judaism, Christianity and Islam. Abraham was the first monotheist. The people of his time, including, according to Judaic sources, his own father, worshiped many gods. Abraham, or Abram as he was then called, had the courage to break with tradition and follow his own path searching for the one God he knew existed.
His relationship with God was not all sweetness-and-light. It was certainly not a "feel good" religion. Abraham's story is fraught with doubt, broken relationships and confusion and covered overall with a wandering sense of alien feelings. Yet, the quest for God continued and Abraham was changed, and history was changed forever.