After reading about a third of this I came to the conclusion that while librarians may be experts on the concept and management of books, this doesn't necessarily translate to the content of a book. For a novel written by a librarian, this book was lacking far too much. It made no sense, was poorly written, and was larded with cliché.
The story is your usual teen trope: a new girl in a new town having acceptance problems. The author throws in the supernatural, but instead of this making the story better, it made it far worse. It didn't help that said teen, Hanna, wasn't remotely likeable. She was living with her aunt, but decided to hit her aunt over the head with a bottle, and leave, thinking her aunt was more than likely dead, to move to small town Texas, where her mother lives. This was a good move since both of these women were quite evidently sociopaths at best, and belonged together.
Hanna hears her dead father talking to her until she starts back on her meds, having negotiated with her mom a two week stay of eviction to prove she can make friends in her new school. Thus far there had been nothing remotely plausible in this story, but that was about to improve. Soon there would be nothing conceivably plausible.
Despite the school being possessed by some parasite that resides in the windows and can turn a living being into glass while sucking the life force and all organic tissue from them, not one single person: not her mother, not her teachers, nor her classmates, tell her a single thing about what's going on, nor do they offer a single warning to her, or a single piece of advice on how to protect herself. I'm sorry but no. The author has made the typical YA writer's blinkered assumption that every single person is exactly the same, has the same feelings and motives and will treat a newcomer to the school in exactly the same cruel manner. I've come to expect this from your average female YA writer; I made the mistake of expecting more from a librarian.
Worse than this, this supernatural crap has been going on at this school for months, yet not a single alarm has been raised about kids dying or going missing. No one from out of town has any idea there's something seriously wrong with this town?
There's also something seriously wrong with the majority of YA authors. A few of them are brilliant, but far too many of them seem to be incapable of creativity or imagination and end up taking the road of least effort, cloning everything everyone else has already written, and applying the same brain-dead ham-fisted techniques of authorship to it. YA is the most blundering, dead-end, mindless, derivative, festering swamp of unoriginality and cluelessness, rivalled only by chick-lit café and/or bakery 'sleuthing' genre (I flatly refuse to read any novel that carries the word 'sleuth' on the cover), and by the chick-lit 'poor spineless rejected girl flees back to her home town and meets Mr Ri-ight like that's going to happen, and he'll save her because he's a manly man and she's just a poor weak woman' garbage genre.
This particular example of all that's wrong with YA has the 'girl hating the guy that you know for a fact she's going to be swooning over in short order' trope. It has the 'no one tells her shit' trope; it has the 'throw the girl together with the guy she supposedly hates' trope. Frankly, it would be easier to list the tropes it doesn't have so I'll stop there. The thing which finally made me throw this book out before it made me throw my breakfast out of my stomach was when the girl and the guy were thrown together after she encountered the evil thing in the glass.
So this guy invites himself to her home afterwards, and she tells him he can't come in, but he pushes his way in anyway and she has no problem with that. At least now they both have the chance to sit down and finally discuss everything that's been going on, right? Nope. Not a word. He explains nothing and she's far too brain-dead to ask any intelligent questions. This novel SUCKED, period.