The Tattooist of Auschwitz by Heather Morris
Ludwig ("Lale") Sokolov was sent to Auschwitz-Berkinau in April of 1942, and after his facility with languages was apparent he was set to work as a "Tatowierer" for the Nazis tattooing numbers on new arrivals at the camps. Shortly thereafter, he met Gita, another prisoner who worked in the administration building. Doing whatever they could to survive, Lale and Gita helped other prisoners by smuggling food and medicine, all the while realizing they could be killed at any moment by the guards.