I don’t remember the plot beyond a few salient points:
- It was an alternate history in which the Soviets won the Cold War.
- There was a description towards the beginning of new apartment buildings where all the walls were made of glass. The idea was that a true Soviet citizen would have nothing to hide from the People or the State and so should embrace being completely visible at all hours of the day by everybody.
- I think it took place in London. That may be my memory filling in though because of the cover.
- The cover showed Big Ben with the Red Army marching underneath.
It was a paperback, and I think I read it around 1999.