PET is about abuse and the shape of justice, because removing monsters requires vigilance. The MC has space to make the wrong decision sometimes and then figure out the aftermath without failure being catastrophic. She has a very strong sense of herself which helps ground the story as she's trying to figure out how to deal with the disturbing disruption to her life which is the main plot. The plot is about child abuse and how a community deals with abusers and enablers, but the text itself keeps most descriptions vague except for a few places where it's very important to be clear about what's going on. I like the way the "no monsters" setup is subverted and examined without making the narrator into a liar. Overall this is a short and cathartic book about communication and justice, with a vibrant MC and really great characterization of secondary and minor characters.