This is an absolutely wonderfully researched historical study book. It is not a historical fiction story. It is written in a thesis/dissertation manner with careful references to how the 3 different religions have viewed the relationship between Abraham, Sarah, and Hagar. I discovered many things that I didn't realize about them and by "humanizing" them, Ms Gordon has brought to mind many emotional points that makes one ponder. Like, how did Sarai really feel about being offered to the Pharaoh. Was Hagar a member of Pharaoh's family or an Egyptian serving girl? Did Sarah ever regret sending Hagar out of the camp? Did Abraham? How have the different religions treated the relevence of God's prophecy during the night of the animal sacrifice. She has studied the different books of the Bible, Torah, and Koran as well as the many articles that have become part of the religions over the centuries. I found it well written, thought provoking, and being a woman, I was also pleased that someone took the time to investigate their relationship from a woman's point of view. Although it is about Sarah and Hagar and their relationship with Abraham, there are also chapters devoted to only Abraham and how his actions and experiences helped or hindered his relationship with his family and followers. Because it left me wanting to go off and explore some of the points for myself, I give this 4 stars.