Ruth Gruener is only five years old when Germany invades Poland. As a Jewish family, she and her parents are constantly in danger and forced to go into hiding for years. Ruth and her parents survive the war and are overjoyed to be free again, but struggle to rebuild their lives. With no business in Poland left, they leave for America for a fresh start. There, Ruth continues to battle the nightmares and flashbacks of her life during World War II. Surviving the Holocaust is not only the gripping story of a Jewish girl during World War II but also shows the difficulties one faces in the long aftermath of a major trauma. Ruth Gruener is the wife of Jack Gruener, the protagonist of the book The Boy Who Survived Ten Concentration Camps.