Barbarians at the Gates, by Christopher Nuttall, is set a little over two thousand years in the future, when humankind has imposed a dominant presence over a considerable number of star systems. The strong centralised government of the Senate seems about to collapse under a combination of external threat and internal dissent - as well as the sheer difficulty of controlling a very large volume of space. The political structure is rigid and authoritarian, with an emperor whose position is largely nominal. Real power is in the hands of a hereditary elite. In amongst this, the space-going armed forces thread an uneasy path, with their own traditions to uphold, and their own mixed history to manage.
Put in a few sentences, this sounds not unlike the Foundation series in concept. However, Christopher achieves something very different, by focusing on politics and battle strategy within a relatively short span of time, rather than allowing the grand sweep of time to have its way.
The political landscape appears simple at first glance, but reveals progressively more levels of complexity - and betrayal - as the plot unfolds. The central characters, for the most part navy men, are compelled to understand and grapple with this as best they can. By and large, it is a battleground which is unfamiliar to them.
I found Christopher's handling of space warfare fascinating. With a few credible constraints on manoeuvre, established in the reader's mind quite early on, the shape of campaigns and battles is formed. Numerical advantage does not always carry the day, and creative use of the complex "terrain" is required. Captains and admirals who can master the flexibility of thinking do well; those who simply follow the rule book tend to lose.
Those of us who have read lots of classic science fiction will be entertained by the frequent allusions to older books. These are used purely for the pleasure of meeting old friends, rather than direct links being drawn between the stories. I, for one, appreciated this.
In short, this is a compelling book for those who enjoy big-picture science fiction. The main focus remains solidly on large groups - such as a spaceship, a fleet, a faction, a world - and the consequences on such groups of the personal choices of the leaders. The details of interpersonal relationships are handled only in passing, and are not really Christopher's main interest here.
The book is self-contained, and comes to a satisfying conclusion. However, the rather unexpected twist close to the end, and the several ends carefully left loose throughout the book, make it clear that there will be another story to follow on.