Well, this book was pretty terrible. I'm not even sure how to review it, honestly; it's not so bad that I passionately hate it (so I don't have any rants stored up). I just feel kind of "meh" now that I've finished it. 
 So, let's see. The writings itself was unimpressive. The sex scene made me laugh, and every so often I got lost in the narrative because something came out of left field. The best example is the "switch stars" that Lizzie suddenly desperately had to train with. If they were mentioned before they became desperately important, I sure as hell don't remember them, which is a bit of a problem for an object that's so incredibly important. The author also failed to ever describe them, so once Lizzie was training with them I had no idea how to visualize the scenes. I also couldn't figure out why they were so important, since the author had already stated several times that the be-all and end-all of being a demon slayer was the Truths. So, yeah, nothing impressive there. 
 On top of that, I was constantly irked by Lizzie. The author kept trying to make her out as a strong, independent woman and all that, but she was consistently looking to Dimitri for strength and stating how she couldn't do anything without him. Even after she decided she was done with Dimitri (for a perfectly good reason), once he showed up again she immediately fell back in his arms because she couldn't do what she needed to without him. And don't even get me started on how a woman who's terrified of motorcycles can suddenly drive one for three hours straight. Not to mention her suddenly sexy wardrobe change after going on and on about how she liked the way she dressed. I could've bought the change if there'd been any change in her personality, but she remained the same person otherwise. 
 Pretty much what I'm getting at here is that I don't really care enough about this book to continue with the series. On the bright side, at least I got it for free.