yep, I actually wrote a debunk on that that was screencapped and put on leftybooru for precisely that claim.
Stalin Biographies
There is a list of sources on Stalin in pic related
Any sources debunking/exposing their bullshit in their books?
Nyet! I've just started reading it. English isn't my first language so it will take me some time to finish it. That's why I wanted to know whether this book is worth my time
He made up numbers. Some Polish guy calculated how many people should have lived in USSR in year X vs. how many actually lived (less than calculated). And Conquest used this data to come to his gorillions
That's the same method used with China
This guy is the author of the number of "60 million victims of soviet repressions" used by Solzhenitsyn in GULag Archipelago.
He worked for nazi propaganda during the war and after war he worked for american propaganda (russian emigrant, respectively)
His name is I. A. Koshkin (Kurganov)