One Day in the Life of Ivan Denisovich by Solzhenitsyn is about a man's day in a Gulag during the 1950s Stalinist reign. It's quite a dry read but emotive and gives an incredibly insight into the world of Russian labour camps. Hope this helps!

While our users may be able to help you out here, we hope that you also will take the time to check out our six-part series, "Finding and Understanding Sources", which should hopefully prove to be helpful for you as you continue in your research.