The humans are still getting their arse kicked, and it seems like the Posleen might be learning something approximating reasonable tactics. If this book was just that, then it would be a disappointing addition to the series (A Hymn Before Battle and Gust Front come before this book). However, there is also some interesting science fiction happening here. It seems there is some sort of conspiracy to control the humans, and there is certainly some dodgy human experimentation going on. Overall, a good book apart from the cliff hanger at the end — I would be annoyed if I couldn’t just pick up the next book straight away.