This book (two books, actually) is amazing, a take on concentration camps unlike any other I've read. Levi was an Italian Jew who went to Auschwitz for the last ten months of the war. The first volume, IF THIS IS A MAN, contains his sociological, often clinical descriptions of the prison camp industry is astounding, how even with almost nothing the prisoners still had a "thriving" economy of barter and favoritism which seemed, perversely, to keep the survivors sane as 90% of the other inmates disappeared into the crematoriums. Sane in spite of the sickness, the filth, the freezing temperatures, the backbreaking labor.
The second book, THE TRUCE, follows his circuitous journey home after liberation, a winding trail through Eastern Europe and Russia which took over a year.