This is a really interesting world that Kincy's put together. Fantasy creatures like centaurs and fairies are real, and increasingly public in their lives. Aside from the Others (or people with a paranormal identity, which is fabulously PC), this is recognizably modern America. Considering that Kincy doesn't give her supernatural characters much in the way of extraordinary powers, this isn't exactly X-Men. Or maybe it is, because The Others is mostly about the sort of prejudice that one would expect to spring up when people discover that vampires, werewolves, and shapeshifters are real. People staring at the centaur in the supermarket? Naturally. Pray the fey away church groups? Sadly, yes. A serial killer who pointedly poses his Other victims in ways that suggest their exact paranormal natures? Yes, I can see this.
Kincy's worldbuilding is the strongest part of the book. Granted, it is mostly our world as we know it, but the way people react to the Others is consistent and makes sense. She also handles the various abilities (and weaknesses) of the Others in a way that's internally consistent and mostly consistent with the stories that her readers will be familiar with. That said, she also ventures outside the usual suspects that pop up again and again in fantasy. There are werewolves, sure, but main character Gwen isn't one. She's a pooka, a Welsh shapeshifter that I doubt many readers in the target audience would have heard of before. Gwen's friend Chloe isn't a fairy, she's a dryad. Honestly, I get sick of book after book being about werewolves or vampires, and it's nice to see some variety.
That said, how much you like this book will depend almost entirely on how much you can bring yourself to like Gwen. I did end up liking her, mostly, but she could be frustrating. She has believable flaws, even if they can be irritating. It can be very annoying to watch her cling to her prejudice against Others that are made (like vampires), not born (like herself- her father was a pooka). And yet, I entirely believe that growing up as she did, in the culture that she did, she'd feel judgmental towards those she sees as making her own life harder. I never felt like the author agreed with her in the slightest, or felt that we should, which made it bearable. The way she handles her relationship with boyfriend Zack (who does not know that she's a pooka) made me want to shake her sometimes, but it's also painfully realistic. How many girls hide important things about themselves from boys they love, out of the fear of losing them?
That said, I had a harder time with how doggedly Gwen stuck with her initial impression that a werewolf Chloe is dating must be a bad person. Of course, she's basing it off of negative werewolf stereotypes, and of course those stereotypes have been heavily ingrained in her. But after awhile, it stops making any sort of sense that Gwen would still be convinced that a werewolf is behind the Other murders, and especially not this werewolf. And yet it takes her almost the entire length of the book to come to grips with that. I was also surprised with how she kept trying to find the killer, against all reason. And speaking of less than wise decisions, how about shapeshifting openly, outdoors, on a sunny day? When you know that somebody is stalking and killing Others in your hometown, shouldn't you be more cautious?
I like the world that Kincy has created, and I think it holds together. I'm torn about her main character. Gwen can be very hard to like, but it's also easy to see why she is the way she is. It seems that other books in the series have different narrators, so I may try those, too.