Chaim Zalman Gradowski

Chaim Zalman Gradowski (1910 – October 7, 1944), originally from Suwałki, was a Polish Jewish prisoner of the Auschwitz-Birkenau concentration camp during the Holocaust in occupied Poland. On November 2, 1942, he was deported, as were all Jews then living in Lunna, as well as neighboring towns, to the Kielbasin (Kolbasino) transit camp (Transitlager or Sammellager). On December 5, 1942, he and all his Jewish townsfolk (numbering approximately 1500) were forcibly marched from the Kielbasin transit camp to Lososno, Poland, where they boarded a train bound for, as he later discovered, Auschwitz. The train arrived in Auschwitz-Birkenau on the morning of December 8, 1942. After "selection" at Auschwitz-Birkenau, his family members as well as all women and children, and most of the men who were on the transport, were immediately sent to the gas chamber and murdered. Shortly afterward, Gradowski and several others from the transport who survived the "selection" were sent to work in crematoria as part of the Sonderkommando slave labor unit.

To bear witness for future generations, Gradowski wrote a secret diary in Yiddish, describing his life and the camp. He buried his notebook in the camp as a time capsule. In it, Gradowski provided a detailed description of the extermination process in Birkenau. He was one of the key figures in the Sonderkommando underground at Auschwitz, where he was murdered during the revolt of October 7, 1944.
A quotation from the diary is used as an epigram for the 2015 book KL: A History of the Nazi Concentration Camps: "May the world at least behold a drop, a fraction of this tragic world in which we lived." In another memorable passage, he wrote: "I pass on to you only a small part of what took place in the hell of Birkenau-Auschwitz. It is for you to comprehend the reality. I have written a great deal besides this. I am certain that you will come upon these remnants, and from them, you will be able to construct a picture of how our people were killed. In this way, I hope to immortalize the dear, beloved names of those for whom, at this moment, I cannot even shed a tear! For I live in an inferno of death, where it is impossible to measure my great losses."
The book's introduction is about him immortalizing his family and his last wish for them not to be forgotten. His murdered family was: his mother (Sarah), sister (Libe), sister (Esther Rokhl), wife (Sonia), Father, and brother-in-law (Raphael and Wolf). All named members of his family were gassed for being "unfit." His father, two brothers and another sister were also taken and he did not know what happened to them. He wrote of all of them in the introduction to his diary.