I'm always afraid of second books. Why? Because if others follow, second books tend to be fillers that just advance the story in a boring, explaining matter. Not this one. I enjoyed it pretty much from start to finish. 
 The story takes quite the jump to five years after the end of the first. Some may say they don't like that because they would have liked to hear more about the first contact with the aliens. Personally I thought it was brilliant, since it showed me just once more that the first contact isn't the center of attention, but rather everything around it. We get to see how much of an impact the first encounter with the extraterrestials has had in the last few years and Marko Kloos starts off with an interesting storyline that pretty much sums up everything that has happened for the last five years without drifting off too far. 
 Basically this book revolves around how humans are dealing with the Lankies and humanitites decreasing space in space (I see what I did there). Andrew gets shipped off to a colony that's basically just an ice rock without much food left. This of course causes the worst and best in humans to come out at the same time and once more the alien problem isn't the center of attention anymore, the humanity problem is, which I very much enjoyed. 
 It's an interesting concept not to reveal much about the Lankies throughout the story. It leaves the reader wondering and wanting to know more - but Marko Kloos doesn't deliver, although not in an unsatisfying way, but in a way that makes you wanting to know more. 
 My conclusion: This series is one of the more interesting ones in the science fiction genre and I am very grateful and impressed that the author doesn't just throw new inventions and sci-fi magic and different alien species in the readers face but it seems he really takes the time to think about how humans would act in such a scenario and describes it really well. Again, I enjoyed it very much.