Lynn Viola’s Stalinist Perpetrators on Trial is a great English piece of work. It uses detailed documents from the Ukrainian archives to document the life and Purge-era careers of several NKVD officers in Ukraine who helped carry out the Great Terror and then were scapegoated in 1939-40 for it by Stalin. It’s a very detailed work based on the most recent primary sources available (Ukrainian SBU archives only opened after the 2014 revolution).

Alexander Vatlin’s Agents of Terror is able to use similar documents (Prosecution files for post-purge scapegoats) to reconstruct their activities during the Great Terror in Kuntsevo (Near Moscow).