Written in 1982, before the Berlin Wall fell or the Cold War ended, this question is the essential one of the book. It often sits in the background, undisturbed, but it is always present. What Craig means by this is, will West Germany turn out to be a failed experiment in democracy, as the Weimar Republic did?
Although we can assume fairly safely that it will not (the conclusion Craig came to as well), this is a marvelous and fascinating book. Craig is a diplomatic historian by profession, and in any study of European politics, the underpinnings and history of Germany have to play an important role. The book is organized by topic, beginning with a three-chapter brief history. The second part has chapters on religion, money, relations with Jews, sexual relations, educational relations, literature, the military, and the unique situation of Berlin, among others. It even has an appendix on "The Awful German Language". The chapter on Berlin in particular was fascinating, although if that is your interest, I would recommend Faust's Metropolis: A History of Berlin by Alexandra Richie.
This is an excellent book. I originally picked it up because of my deep respect for the author (see my review of Force and Statecraft: Diplomatic Problems of Our Time) and my fascination with all things foreign. I didn't put it down for any length of time until I finished. Perhaps the best way to understand the German phenomenon short of living in Germany.