So, Striking The Balance finally sums up all the lines Turtledove had started in his first book of the Worldwar series.
For those who have already read first three books, the further development is quite predictable. After over two years of fighting all around the world, with its fronts spread too wide, and its lines becoming yet thinner from day to day, with too many cities levelled down to eatrh, and several of them lying in radioactive ruins, the Race stands now before two unpleasant options: either they will have to turn all this world together with all its inhabitants into a radioactive desert unsuitable for colonization, or make peace with Major Forces of this world (USA, Third Reich and USSR) and those who were able to prevent their occupation by Race's forces (Great Britain and Japan) on conditions of status quo. And this means that all these nations with all their Tosenite's ability to pick up and introduce innovations into technologies they develop on basis of what they've stolen from Race, and with all thier aggression, will have time to prepare themselves for a new round of fighting. This very idea alone should make Atvar feel uneasy...
Historisn by profession, Turtledove has a brilliant insight to predict what would have happened if...
What will happen with the main characters of the novel? Will Ludmila Gorbunova and Heinrich Jaeger meet at last? Will Liu Han become a promimemt leader of of Chinese Red Force? Will Reich's terrorist No.1 Otto Scorzeni become "Osama BenLaden" of this alternate world, or will he fail, and only one thing can make him fail - his death? Read the book, it's worth reading.
And finally, a remark from the reader from the other side of "iron curtain", which has finally (and fortunately) fallen. The specialist on Byzantium, Turtledove came close to understanding of Russian character and mentality in the parts of the novels, which consern the events in USSR, but sometimes not close enough. His attitude reflects general attitude of an American historian to the events of WW II. Despite all the horrors of Bolshevism, despite all the insuffeciensy of Soviet system, and its neglect of a person, despite the Red Army's inflexible doctrine it really had in 1941 and in early 1942, the Russians could learn and managed to learn. But for this, they would have never finished war in Berlin. Germans were tough teachers, but Lisarzs would have become yet tougher teachers.
For all who are interested in history of Soviet preparations for WW II I advise that they read Ice-breaker by Victor Suvorov (translated to English). This book had created quite a stir in ex-USSR having divided it into two camps of those who supported it completely, and those who who rejected the very idea put in its basis.