In 1940, the Polish Underground wanted to know what was happening inside the recently opened Auschwitz concentration camp. Polish army officer Witold Pilecki volunteered to be arrested by the Germans and reported from inside the camp. His intelligence reports, smuggled out in 1941, were among the first eyewitness accounts of Auschwitz atrocities: the extermination of Soviet POWs, its function as a camp for Polish political prisoners, and the final solution for Jews. Pilecki received brutal treatment until he escaped in April 1943; soon after, he wrote a brief report. This book is the first...