Sci-Fi Romance 
 I thought at the beginning this might be a FF book from the glances the heroine kept giving another spacer. Frankly, while I significantly prefer MF books, the novel could have been vastly more engaging for me if the heroine was bisexual or lesbian. 
 Book one of a series. The women (and the hunks) become, or already are, gladiators. Against their will for the main female MCs, at least in book one. Like gladiators in history, blood flows and some lives are lost for the cause. 
 The author tried to build in decent tension points but I found them, and the characters, too predictable. How many hunks have a history of never wanting a woman for more than a one night stand ... until the heroine drops out of the blue? That's right ... many too many. 
 Ms. Hackett did get me, as a guy, to care about what happens next to the heroine, which is usually one aim of an author. I liked Gladiator enough that I might read another in the series, if available on KU.