FYI for anyone with vision issues: the font in the printed edition is very small. If you're buying the book, it would be worth spending the extra money for the ebook edition for this one. I was frequently tempted to pop for the $7.99 myself (I hate publishers that charge more for ebooks than print, the print was only $6.37 at the time of this review) even though I had the library book in hand.
I definitely recommend reading the first book first with this one, don't jump into this second book cold. It gets right into singing the lines and it never really explains what that is or what the lines are, it won't make much sense to you without the background. There isn't any recap about who the people are as well, you have to try and pick up who Fergus, Michelle, Katida, Orsaya, etc., are, and more importantly who they are to Ean. But for me, having read the first book, it felt like they did an OK job of refreshing things without coming anywhere close to recaps. I have a terrible memory but as it went along it all was came back to me even though they never said something like, this lady is this admiral that Ean always has breakfast with, don't you remember? And that other woman is the admiral who likes to sleep with all of the high level linesman, everyone knows that, don't you remember, dear reader? That one was hinted at but not stated outright, they talked about her reputation but didn't say what it was, so new readers would totally miss it. It all came back to me eventually, but a bit of recap would have been helpful instead of just forging straight ahead. They did explain the political situation sufficiently, that would have been too much for me to recall. They did a good job of working that into the story, no infodumps. But I'd have liked to see more of Ean recalling his relationships with the people or something that indicated who they were. And new readers would miss so much. They'd probably enjoy the story well enough, it could be complete in and of itself to a certain degree. But they wouldn't understand the significance of the battle for Ean's contract with the cartel, anything about how amazing discovering the Eleven was, how the fleet got tied together and what that meant, why Ean being a twelve means so much, and so many other things.
As for the story, I enjoyed the book a lot, as I did with the first one. I think they (the authors are sisters) have a lot of great ideas and I'm excited to see where their careers go. It's not perfect though, I think they're still learning this craft. Ean is still too naive and idealistic for a slum kid, all wrapped up in his lines, seemingly much younger than his years would indicate. And it was a little scattered. Was it about people trying to kill Ean? Or kidnap Ean? Or kill the new captain? Or line seven? Or the new crew members? Or the Eleven and needing a crew? And the new head of security? She's a peach. Or the cartel wanting Ean back? Or the war? Or so many other things that were going on. That doesn't even include the politics. The complexity is good on one hand, it's a realistic universe that isn't over-simplified. There wasn't any storyline that felt fake or out of place. It felt like a space opera should, a rich and complex interstellar story. But it was a bit scattered. And it ended with a real whimper, the last few pages stunk. It was just a tiny bit of political maneuvering, nothing dramatic, nothing that left an impression or made me excited for the next book. There was a bit of foreshadowing that a super minor character that I don't care about at all is going to cause trouble in the future. But compared to the interplanetary war brewing, I'm sure she'll be a pain in the neck but it isn't the thing that's going to get me to rush out to get the next book. Something wild about the lines or the ships, something poignant about the great new captain Kari Wang (who didn't even get a wrap up/lead into the next book), anything else would have been better. I'm excited for the next book, don't get me wrong, but it's not because of the last couple of pages. It was a good book and it's an exciting series. But I think this book suffered a bit more for the authors being new writers than the first one did. Or maybe they had a harder time working together, and trying to include all of both of their ideas was part of the problem. I don't know, but it was a little bit rougher than the first one. But still really interesting and fun and highly recommended.