I have read a lot on the Eastern Front over the years, but this book was great not only for how well the author laid out his argument, but also for how he weaved it into a general telling of the War in the East. His opening chapter on the historiography of the East Front was also terrific.
His basic argument addressed the key issue of the replacement of men and material on the Eastern Front from June 1941 to July 1943. He supports his argument with a ton of charts and tables. His sources are thorough and I have added about 8 new books to my wishlist on Amazon as a result.
I would highly recommend this book to anyone who has a major interest in the East Front. You won't be disappointed.