The book of memoirs by Reinhard Gehlen, an intelligence officer of the Nazi army during the Second World War and the creator of a secret intelligence organization in Germany, allows the reader to look at the historical events of the 40s - 60s of our century, as if from the opposite side of the front - military and ideological - and because of the Iron Curtain. This is both a reliable historical document and an interesting story about what was hidden behind dry military reports and official German propaganda. The book is distinguished by impartiality and accuracy of assessments.