Carroll is an absolute master at setting a horrific scene: the build-up, the tension, the malicious foreboding that precludes a disturbing payoff. She knows how to play with her readers, how to hide small details in plain sight, of instilling us with a similar feeling to that of the main character, that things aren't exactly happening as we remember them or as we're told. We feel just as out of sorts as Abby, where delusion may be slipping into reality and vice versa.

The art of this story is absolutely visceral, where moments of domesticity overlap with nightmarish creatures that look straight out of Hell. I liked the small detail that Abby seemed to be the only character without pupils (that I remember), giving a small hint towards the validity of her perceptions. 

Not everyone is going to be satisfied by the open ending, but I didn't mind it. The horror comes from the vagueness of it all, that all the things that we imagine are going to be scarier than what actually is. We don't get answers, and that can be frustrating, but also terrifying.