I highly recommend this triology by Tom Rob Smith that begins with Child 44, then The Secret Speech and concludes with Agent 6. It gives a chilling glimpse of life in the USSR during the Cold War and covers a time period of about 20 years ca. 1960-1980. It details the life of KGB officer Leo Demedov and his evolving view of the Soviet Union during this period, and contrasts his public life as a servant of the state and his private life as husband to Raisa and then father to Elena and Zoya.