I haven't any idea how long this series was initially intended on going on, but I thought it was a trilogy based on the tone and pace of volume one. Now we're on to volume four with as much in front of us as behind.
In addition, the author is caught in a trap that befalls any multi-book series. He can either assume the reader in the later books has read the previous books and is up to date on them or he needs to constantly insert flashbacks. Here Anderson uses flashbacks and uses them quite a bit so if someone were to have read volume one months or years ago they'd be refreshed as to the tensions and relationships. The downside is if one were to find this series and consume them in rather rapid order, the flashbacks become irritating and slow the narrative down. This book is replete with sentences like, "X looked with annoyance at Y remembering that in the battle of Z, Y failed to perform some task or another." That's fine unless you just read about the battle of Z a few days ago as I had. It seemed to this reviewer that we couldn't get a page or two without yet another flashback.
I understand the need for this so I'm not knocking the book down but thought to mention it as a heads up for readers who may be more annoyed at this than I was.
What has me annoyed is that, like Robert Jordan, Taylor Anderson has found a world which immerses many readers. Rather than have a neat, tight trilogy or two book series, he or his publisher or someone has decided to streeeeeetch this thing out. To me, this would be stronger if the stretching included many more details of the alien societies which are still superficially treated now four books in. Instead, most of the action is among the few humans (two threads of humans, but all human) and the aliens do very little unless they are acting in concert with or in reaction to, humans.
I enjoyed this book as I enjoyed the series but I'm bothered by the prospect that it'll be years before the series finishes dealing with the issues facing it now. In addition, there is a whole new world to explore which could have been and may be in the offing.
I gave up on Jordan's Wheel of Time series when the mid volumes slowed down to glacially narrated office politics. I hope this doesn't occur with Anderson's series, but as of the slowdown in volume four, I'm seeing similar symptoms.