I just took it out of the library, but haven't started it yet. As far as I can tell from online references he attempts to analyze the rise of the Nazis from the period of the Weimar Republic onward. Much of his writing is about legal frameworks for societies and the role of the separation of powers.
Many other books I've read have looked at the period from economic and nationalistic points of view. Certainly the extreme economic dislocation after WWI was unique for an advanced industrial society. Policies not Politics ---- Daily Landscape
If I may recommend you another great book of this early era, I would like to point your attention to Ernst Fraenkel's "The Dual State" "Der Doppelstaat".
Also worth reading is Hannah Arendt's great Origins of Totalitarianism
One last recommendation: Deborah Lipstadt published her account of her trial against Holocaust denier David Irvin in the great book:
"History on Trial: My Day in Court With David Irving," by Deborah E. Lipstadt (Echo, 2005) $25.95.
It contains the expert statements on the origins and the dynamics of the Holocaust, by i.e. Peter Longerich and is a fascinating book. For more on the book, go to her blog