The Polish underground and one courier’s attempt to alert the Allies to mass murder form the core of Jan Karski’s wartime memoir. He describes the German and Soviet invasions of Poland, clandestine political organisation, imprisonment and escape, and his efforts to carry information from occupied Europe to Allied leaders. The book includes his secret entry into the Warsaw Ghetto and a transit camp, experiences that made him an early eyewitness trying to report the mass murder of Jews to governments abroad. Karski’s prose is urgent, detailed and shaped by the need to explain an underground state to readers unfamiliar with it. The clearest marketplace links are resistance memoir, Holocaust testimony, Polish wartime history and espionage-related nonfiction. Read more Less