A book following the lives of those introduced in 'Those who serve', taking place about a year after the events at the end of that book.
Several sub-plots intertwine: an unhappy marriage, guilt over a death, worries about unfaithfulness. The characters are all cleverly woven together with some enjoyable sub-plots, and the conclusion is satisfying.
I first read this nine years ago, and had almost entirely forgotten it.
While it stands alone, it's probably best to read after 'Those who serve' to understand better who is whom.