The Gulag Archipelago
This.
Also,
The First Circle.
I had seen the German film
The Lives of Others on DVD on a 19" SDTV. Powerful stuff. Two days ago my new Blu-Ray of it arrived, and I watched it on my 32" 720p., and was able to determine that the "Western literature" the Stasi find during their search is
The First Circle (in German,
Der erste Kreis der Hölle).
The Lives of Others should be seen by Americans. While fictional, and unlikely that a Stasi officer would be allowed to handle a surveillance solo or even with a trusted acquaintance, it is a window on life in the GDR. Some of the actors, including the one portraying the Stasi officer, are "Ossis" with first-hand knowledge.