I enjoyed this, though I did think it was far too long, and a little unfocused for what it was. I feel like it could have been pared down to more effective essentials, but the focus on generational trauma was done well. I wish I could say that I found fifteen year old Oliver convincing, but I didn't really - he was enormously sympathetic, but he wasn't convincing, and the similarly-aged Jake was neither. The adults, however... Oliver's parents Nate and Maddie, the other two tent-poles of this three-protagonist book, I did warm to more. They were both sympathetic and convincing, especially Nate, and I liked their relationship. 

It's always good, in a horror that features a teen protagonist, to see a strong family unit. So often there's a temptation to make the horror family dysfunctional in some way, or have the kid either partially or completely orphaned by the ever-popular dead parent trope, but even with the terrible family history that Nate's saddled with, he and Maddie have managed to create, for Oliver, a haven of love, sanity, and solid relationship skills. That was what I most enjoyed about this, I think. And not only did Nate and Maddie work together when it came to their family, when weird shit started happening they talked to each other and believed each other and it's actually really refreshing to see. I had no interest at all in the cosmic demon thing, but the central family kept my attention, so more horror families like this, please!