A Failed Empire: The Soviet Union in the Cold War from Stalin to Gorbachev (New Cold War History)
by Vladislav M. Zubok

https://www.goodreads.com/book/show/..._Failed_Empire

I am more than halfway through this book, and it is interesting, informative and frequently enlightening (as in shedding new light on old topics).
Well worth a read (but then again, I am just an amateur reader, what do the experts say?)