Book will make sense when read alone.
Unfortunately it ends very abruptly.
Writing is good and story moves along, but this feels very much like just a piece of a puzzle-very limited view.

Spoiler for end of book and reminder for me in series

book ends as soon as main character realizes that the suit is converting the soldiers as they are wounded and that they will never be set free of the suit.  Kind of naive of main character not to realize he’s never seen anyone retired from this service. “War changes people” is the  message?