I've been lazy about writing this review, mainly because I'm not quite sure what to say. It certainly kept me interested the whole time... But somehow I can't shake the feeling that the outcome was a bit underwhelming, and I'm not quite sure how to account for that. 
 I had never read a planet settling story before, but it felt like I had. Bringing in an intruder into your hanging-by-a-thread-but-apparently-peaceful-community is probably an overused plot device. Because you just know, this intruder will most likely grab his scissors while you're not looking and send everything you've been trying to build straight to hell. 
 The divine mission setup has also been done before. And let's face it, it's not that interesting - unless you bring something new to the table like Atwood in The Year of the Flood. 
 Finally, you know the 'good guys' have done something fishy from page 1. It's a first person narrative, there is no way you wouldn't know. So you expect the big reveal, hoping that it will shocking enough to compensate the fact that you're already in on the secret. But in the end, it really isn't. 
 That being said, it might just be me. Reading other reviews led me to believe there would be a huge plot twist, so it probably worked for other people. Maybe I've just watched too much TV and now nothing can shock me anymore. 
 Now, the shiny pearl of this novel is its handling of mental health. Often overlooked in literature, mental issues are more and more predominant in modern society. Anxiety is like a dark phantom grabbing people one by one, not caring for age or ability - a dark phantom that must be made to be seen, quickly, so we can forge our weapons to fight it before it becomes the norm. 
 Other "problematic issues" are often addressed in science fiction, but unfortunately not often anxiety or depression. I can see why, anxious characters do not make it easy to tell good stories. Throughout this book I kept being frustrated because our protagonist was too anxious to take part in major events. Where's the fun in that! 
 However, the main character was at times frighteningly relatable. A few years ago, I had a phase in which speaking to people felt so daunting that when going to the supermarket I'd go to the one slightly farther away from my house only because it provided self-checkout. Some people might think I'm crazy, but I'm certain that others will know what kind of feeling I'm talking about. 
 Portraying mental illnesses in literature is definitely something I would like to see more of in the future. Not only to raise awareness amongst the big public, but also to offer solace to those who suffer from these problems which can often be so isolating.