The best accounting I have read is Martin Amis's "Koba the dread". If you have lots of time, check out Solzenhitsyn's "The Gulag Archipelago".
Too lazy to read: do a google on Vorkuta.
As to why no one talks about Uncle Joe - well, most people are stupid. But here is some philosophy on it:
The idea of Communism is an idea of perfecting society: creating a perfect world out of imperfect people.
It failed, and it failed on the greatest scale in human history: the Red Terror and the Great Terror left 20 million dead BEFORE WW2, which killed maybe another 20M. One of Lenin's goals, which Stalin made a reality, was state control over food.
Stalin's reign probably crushed 50 million russians - he makes Hitler look like a common street thug, and of course their families....you could rightly say Stalin casude the death or ruin of over 100M people. No signatures were issued for those who starved to death; cannibalism was popular during the red Terror. (Some of the nastiest, most disgusting pics I have ever seen are those of russian peasants with frozen bodies cut up for food. Parents ate children, etc.)
The USSR produced more food per acre in 1916 than in 1986.
Communism's abject failure - its destruction of more people and more lives than any other system anywhere in history - is a final refutaton of the idea that society can be perfected.
We don't like to admit our shortcomings and imperfectibility, so Stalin's massacres and the abject failure of Communism is swept under the rug. In some ways, we see the Russian killing machine as all of our fault, and we don't like to confront our imperfectness.