Based on my reading of the first few chapters (which focuses on the main protagonist and setting up the story) and my email exchange with the author, I'd characterize CASSAFIRE as romantic SF.
Below you'll find the blurb, non-spoiler tags provided by the author, a brief excerpt, and the book trailer. I don't normally feature book trailers here, but this one is professionally animated and includes the heroine, which lends it a light SFR flavor. I also think it has an effective, tight focus. (Per Mr. Cavanaugh, the software used to create the trailer included 3D Studio Max, ZBrush, and Photoshop.)
At any rate, peruse the information to discover if CASSAFIRE is up your alley!