"Don't let her know you're scared," Alexander's father had said to him the first time Alexander had sat on Sari's back. Fourteen-year-old Alexander Altmann doesn't need to look at the number tattooed on his arm. A10567; he knows it by heart. He also knows to survive Auschwitz, he must toughen up. Being soft will get him killed. Alexander will take any chance he's given - and when that chance is caring for the German officers' horses he grabs it. He just can't let them know he's scared.