During World War II, Ralph Troll was a small boy living with his parents in Darmstadt, Germany. Their city was known as Wissenschaftsstadt (City of Science). Ralph's mother was Jewish so, in 1938, his father moved his family to an isolated farm about ten miles from the Rhine River. His father hoped to escape Nazi persecution. He knew it was a threat to his wife. His father was a chemist and continued his work, even though his laboratory had been bombed. To escape the Allied bombs, Ralph, his parents, and his baby sister often spent nights in the cellar of the farmhouse or days in nearby...