Although an older book, written before the West had full access to the Soviet archives (though Paul Carrel, a former journalist for the Nazi Party, did have some access to Soviet records as there are many first hand Russian accounts retold here), this is still a valuable, and rapid paced book on the decisive phase of the war on the Eastern Front.
The book is formatted a bit oddly, however, and it detracts a bit from the overall rating for it. For whatever reason, Herr Carrel decided to tell the tale of the epic Battle of the Kursk Salient first, before returning to where the first book (Hitler Moves East/Hitler's War on Russia) left off. This makes for a jarring reading experience although his coverage and analysis of the German perspective of the Kursk battles is very sound.
This book is, mainly, from the German/Axis perspective with accounts from the Germans, Finns, Romanians, Hungarians, Croats, Italians and Spaniards who took part in Hitler's ill fated anti-Slavic crusade. There are, as I mentioned prior, Russian/Soviet accounts as well, but they are a minority of the book.
Even so, this book is a valuable addition to your military history library. Carrel, decades before Glantz, Stahel, Citino and others pointed it out, showcases how well the Russians had improved and learned from those dreadful days of 41 and 42. He also brilliantly showcases the growing desperation of the German war effort, and the looming sense of impending catastrophe as the Soviets, post Kursk, begin to pile up victory after victory.
Although the book can be seen to place an emphasis on the heroic bravery of the German soldier and line officer (which may offend the hyper PC reader), it does so in such a way that, narratively, we see just how greatly improved the Red Army would become, and how diminished was the Wehrmacht by late 1943. Certainly they made the Soviets pay a horrendous toll in victory (inflicting on average losses to the Red Army of between 2.5 and 3-1 in the Germans favor), but the materially outnumbered, and logistically impoverished Germans lacked the means to make good their losses in either men, material or lost experience. While the Russians could, albeit with American Lend Lease aid.
The great failing of the narrative, however, is Carrel's parroting of the line told by German generals post war. Mainly that at Hitler's feet lay all the blame. While Carrel does do a good job of showcasing the genuine skill of the Red Army, he falls too often to the temptation to whitewash mistakes made by German commanders at the front and in the Staff.
Irregardless, few books of the war are as valuable as this one for the German side of the equation, a side of the coin that tends to be lost amidst the current generation of military historians who are more Russian centric.
This book, and the predecessor, can still be found though a bit pricey. However, they are both well worth the cost.
Very highly recommended.