Domenico Losurdo "Stalin: History and critique of a black legend" is the best book on the topic.
Early USSR was in a permanent state of emergency due to several factors like the backwardness it was found, devastated by war, foreign powers invaded, counterrevolution threats, and the rise of fascism in the west.
Losurdo builds on this foundation for his defense of Stalin, compares his policies to those of the "free" west (these would be called whataboutism by liberals) and, what makes his book special, it exclusively uses anti-communist sources to contradict these narratives.
In the book you will find even quotes of Hitler struggling to comprehend how these primitive people managed to develop, Goebbels accepting that they underestimated their material development, Goebbels enjoying using trotsky to cause unrest, different western leaders praising Stalin prowess, etc...