Beria and the NKVD on the eve and during the years of the Great Patriotic War

Disputes about the personality of Lavrenty Beria still do not subside: who he was - an “enemy of the people” and a bloody dictator or one of those who strengthen the power of the Soviet state?
How was his appointment in the fall of 1938 to the post of People"s Commissar of Internal Affairs for the combat effectiveness of the NKVD? What did his subordinates during the war years do and why did many of the Chekists receive combat orders? Why was the intelligence and special detachments of the NKVD, and not by military intelligence or partisan detachments, the command of the Red Army entrusted the fulfillment of the most difficult tasks?
The reader will find answers to these questions in the book of A. Seever, an author familiar to a wide reader"s audience on his detailed research on the history of Soviet special services