I feel like when I finished watching the Matrix trilogy and Inception movies, kind of confused, but maybe it's just me. The series has a satisfying ending although some questions are left unanswered, maybe the novella following this book will clear things out a bit. I'll try to read it today. 
 I'm torn how to rate this book because I liked the story overall but I hated Ruuel's and Cass's relationship! I'm a bit annoyed actually. It's completely unrealistic, not only for a young adult romance but also for an adult romance. Very big spoiler rant ahead, I need to take this out of my chest: 
 (view spoiler)[ So, they abruptly started a relationship and start practically living together right away. OK, I can deal with that. Then, they had been going out for like two weeks when they get engaged. WTF? You are kidding me right? Wait Wait, that's not all... a few weeks later they ADOPT 3 children. WHAT?! Wait wait, there's MORE. Near the end of the book, they adopt a 4th child! Seriously, I have no words... wait yes I have. 
 In just a couple of weeks Ruuel turned from detached, cold and not wanting distractions to loving to be husband and father. Seriously? And what about the rest of the characters? The same thing happens to them! They turn from a cold, polite and correct military group to all smiles, hugs and kisses. 
 About the 4 kids, I'm really annoyed how this book portrays the adoption of 4 children by an 18 year old and a twenty year old, not because it's wrong, but because it is written so unrealistically. Raising kids is not easy, lest of all 4 of them appearing out of nowhere when you are still young yourself. It's difficult, full of insecurities, messy, loud, tiring and most of the times create arguments in a couple that they previously didn't have. Instead it is portrayed really easy and idealistic. Cass feeling a little insecurity in some chapters is not enough. 
 For example, magically they always find someone willing to babysit.... that doesn't happen! Not one of the characters seems to be annoyed, or surprised, or conflicted, about having 4 kids running around giving no rest to anyone. They go all for it and help two teenage and busy parents with their responsibilities. Awfully convenient for them when they have rotations, missions or Cass is on medical due to one of her nightmares or something. Not even KOTIS's command says "Hey you two, do you really think KOTIS is a stable place to raise children? You'll be moving from Tare to Muina with only a day notice and being in mortal danger every day". Maybe it was intended to be a character development for the SETARI, but the lack of conflicting emotions makes it rushed and out of character instead. They kids also VERY well behaved kids. I can understand Ys and Rye behaving that way because of their submissive nature, but Sen has no excuse. Where are her rants? Her whims? Her cries? Like every 4 year old I know. Also, their planet just FUCKING exploded! Where are their nightmares? Their homesickness? Their tears? Their trauma? These 4 kids have a few nightmares but nothing more. 
 Also, Ruuel and Cass together are too perfect. They don't fight... they got engaged and adopted kids without having one! One of those necessary fights where you yell your lungs out and want to storm away from the other feeling exasperated, finally making up a while later after giving the cold shoulder. Every couple needs that; it is the process of maturing a relationship. Also, their actions towards the 4 kinds are mature for their age, while Cass seems like a teen at other times. They just float in a pink cloud... all of them. 
 (hide spoiler)] Oh, and did I mention that all this happens roughly in 4 months. This relationship is a big NOPE for me. 
 Wow, that rant felt so good. Mara and Lohn's relationship: that is a normal, mature, and endearing one. We have glimpses of their love and care for each other throughout the series without being too affectionate in public. (view spoiler)[ We get to know that they have been living together for a while and postponed their getting married and having kids for when they are no longer Setari (the reasonable thing). They finally get engaged in this book, which was sweet and believable, and Mara gets her maternal instinct pumped up when the first 3 kids are adopted by Ruuel and Cass. It is also understandable and I think it was the only character development which I liked. She is also the one who tells Cass that maybe it is not a good idea for her and Ruuel to adopt the 3 kids. Nils and Zee, where interesting too. We get to know more about them. (hide spoiler)] 
 Regarding the plot, until the 15% mark it's all about Ruuel and Cass. As their relationship was so abrupt, the author needs to spend time building it a bit. If more interest was shown in the last book from Ruuel, maybe less time could have been spent on their relationship building in this one and part of my rant avoided. 
 After the "we are perfect for, and really love, each other" part of the book, the plot gets really interesting as Cass gains control of her abilities and helps uncovering Muina's history (avoiding the "we are such an incredible family" parts). It's really good to see the 3 cultures in a joint venture setting apart their differences. Also, still loving the idea of how the government isn't the villain here despite its flaws. (view spoiler)[How they rushed to help Nurians in their time of need not thinking how they were always rejected and giving refugee to them. They leave most of the decisions regarding them to Nurian representatives instead of imposing them to the refugees. How they allow Cass the decision to make her story public and let her have her 4 children despite being a military facility, even adapting their room in advance when they return to Tare (hide spoiler)] 
 The ending still felt a bit rushed, everything was resolved in one chapter and I'm still a bit confused about what was really going on. But maybe it's just me I didn't get it. For example: 
 (view spoiler)[ 1. Was Cass right about Earth's connection with Muina? I didn't mind it went unanswered, it leaves a little of mystery. 
 2. Was the parasite world destroyed? Nobody is feeling bad about committing genocide? 
 3. How long till they can regain connection to Tare and Kolar? 
 4. Did Cass's family ever get her letter, photos and diaries? 
 5. What was the "event" Cass projected on that room con Kalasa? If it wasn't the past and was the parasite world, what was it? 
 (hide spoiler)] 
 I don't mind these unanswered questions and complex plot as I mind Cass and Ruuel's relationship though. Long reviews are not usually my thing but I had a lot to say, sorry :) .