I just finished another novel by one of my favorite authors, David Gregory. I really enjoyed The Last Christian for several reasons, including the creation of characters I truly cared about, but there are two big reasons that I find myself continuing to think about. The book is set in 2088. Abby Caldwell, who grew up as the daughter of missionaries in Papua New Guinea in a tribe cut off from the rest of the world, comes back to the U.S. and learns that Christianity has died out. She is “the last Christian.” Her grandparents had left her a message sixteen years before telling her that God had impressed on…