Thanks to NetGalley and ECW press for an advance copy!

tl;dr
A very dreamlike story that focuses on a sister relationship and the difficulties of growing up. Easy to lose grasp of the plot in places.

About
The Ivyweather sisters couldn't be more different. Older sister Constance is the perfect picture of societal expectations on the outside and roiling anxiety on the inside. Energetic younger sister Ivory doesn't care in the slightest for societal expectations, and spends most of her time alone exploring nature. It's their last summer together before Constance has to leave for college, and they're spending it in the town of Quixx, a strange place where the fog never leaves and the residents whisper about monsters that live on the nearby mountain.

Thoughts
About halfway through the story, Ivory comments that the events in the book are "Curiouser and curiouser," and I feel like the reference to Alice's Adventures in Wonderland is apt. There's a very slippery strange logic to the world and the people in it. Physics don't always work as expected, time seems a little out of joint, and no one in town seems to take notice of this. Events unfurl into each other with little direction as the two leads move through a very dreamlike story. The biggest difference in this case is that instead of Alice, we get Constance and Ivory. Ivory embraces the strangeness wholeheartedly, running directly toward adventure and danger. Constance attempts to play the logician, hoping that if she manages to control herself, the rest of the world will also fall into place. The friction between the sisters forms the foundation of the first third of the book, with the rest of the book about them slowly finding their common ground again. As this is the first book in a set of five, we don't get a lot of answers, so the development of their relationship is the core of the story's progression, to the point that the plot takes a back seat more often than not. The blurb for the book describes it as unabashedly queer, and I can confirm that is the case, with multiple sexualities and gender identities written into the canon and handled with respect. Also, there is definitely a monster romance in here. So if you like that, congrats! And if you don't, now you know.