If you're reading this, expecting a more traditional D/s book, you'll be sorely disappointed. I would classify this as....D/s light. If that. Calling the men Dominants and the woman Submissive doesn't make it so. The men are dominating, sure - but not Doms. The woman has submissive tendencies, but she's not a Sub. I would say they more dabble with D/s than actually being D/s. I found the whole safeword part of the book embarrassing; for the author. 
 The D/s thing aside, it's an all right book. Enough of sexual encounters to keep anyone happy, though I've read raunchier things than this. 
 The whole drama with the drugging and shooting and stuff; didn't quite fit into the plot. 
 An OK book that is a quick read if you don't want to delve into anything heavier.