mediocre degree a mediocre trilogy ...

But first briefly to the content:
Sable and Hess have an alliance to help achieve the Still Blue of Cinder and the hovercrafts of the settlers.
Perry and Aria give everything to save the Tides, and Roar's anything to take revenge for Liv's death at Sable. For this purpose a lot of action,
Romance and profound conversations.

Among the characters:
With the main characters I could somehow start from the beginning not much. Aria I found quite interchangeable - she's pretty, a Aud can sing well and develops into a decent fighter, in my opinion, however, remains ultimately "pale". With Perry I'm not warmed up - to him everything seemed "too much": its dual talent as Scire and Seer, his outstanding for his age leadership, his combat and hunting skills, his willingness to sacrifice his difficult childhood, his pain tolerance, etc. . Accordingly, little touched me the romance between the two.
Because Perry and Aria I had the second and third band probably did not read, if I had not been given. And in the third volume, I found it the worst;)
Of all the characters have most liked me Roar and Liv.
Too bad Liv only the second volume times "personally" appears briefly and Roar is so much as a by-character in Perry's shadow. With the two protagonists as the trilogy would have certainly significantly pledged more!

To course of action:
On the positive side, as in the first two volumes, that it does not become boring. Even the plot I think is not bad on the whole.
However, it's me with the action at times too much - too much Gekämpfe and unnecessary bloodshed. Too often also details will not be considered, such as Aria with her injured arm just goes swimming or so in an explosion tearing her eardrums, she can but five minutes later heard again. These little things make the story whole appear implausible and constructed.

For writing style:
The language used is simple and direct. There is nothing wrong.
What bothers me is that permanently "dramatized" is, for example, "In all of her, life had never hurt her heart like this.
Never. "
Or:
"She Could have lived every minute she'd had with him better. She Could have always spoken the best words to him She Could."
There would be less might have been more.
Also, I would have liked more detailed descriptions in some situations.

(Spoiler !!)
For example, in the final assault on Sable: How many soldiers / minders were there? It is unlikely that there were only two or three, when you consider how "well organized" and was careful Sable. With more troops the situation would be most likely have been different!
(Spoiler end)

This also has the overall credibility and thus my reading pleasure rather limited.

Conclusion:
If you liked the first two volumes, will not be disappointed by this. Who could not with the protagonist from the outset and emphasis on credibility, should not expect any improvement in "Into the Blue Still"!