This is a well written continuing story of Earth's first encounter with alien species, one friendly, the other anything but. The action moves at a steady and gripping pace, well described and with characters equally fitting into place. As military space sci-fi it is pretty good and I have thoroughly enjoyed the story so far. My only caveat would be to advise reading the books in chronological order to get the best out of the series. Highly recommended and I am off to read Book 4. That's one of the things I love about my Kindle, instant sequels!