For the first time in history: in detail and reliably about the unknown heroes of the camp underground. General Dmitry Karbyshev, poet Musa Jalil, members of the "Fraternal Union of Prisoners of War (BSV)", prisoners who escaped from the "death block" of the Mauthausen concentration camp – these and other examples of courage are described with documentary accuracy on the pages of this book. These materials became an indictment against the executioners at the Nuremberg trial. The book is equipped with unique photographic materials that give an idea of the people of that heroic time, the essays are supported by documents and certificates reflecting the true course of events.