This is a pretty decent one-volume history of the war in Russia, but nothing particularly interesting. At 536 pages, the book just isn't long enough to do justice to the entirety of the war, so coverage is a bit hit or miss, often glossing over major battles in a couple of paragraphs. While this is to be expected, it does make for a fairly generic read and does not offer much insight into the specifics of the war.
I did not read the first edition of this book, so cannot do an explicit comparison vs the second edition, which was supposedly prepared to take into account much of the recent scholarship regarding the war in the East. But oddly, while the author mentions some of this scholarship in the foreword, little of it seems to be reflected in the book itself.