I was in love with the premise of this (family wakes up trapped in their own house with a murderer), but Collings doesn't follow-through with his promises, and his characters are super unlikable.
The prologue of the book shows the aftermath of the Killer's work, and it's horrifying. Blood everywhere. People hanging from hooks. Dismemberment. It's a promise of grossness and horror that the book doesn't deliver. When we get to the actual kills, they're relatively tame. This could be fine, but the family doesn't even interact with the Killer for real until over halfway through the book.
And that's probably one of the two biggest problems with the book--the pacing. We spend three chapters with the main character driving up his driveway. Then the first half of the book is the family running around their home, seeing weird things, but not much is actually happening. Like, yes, this is creepy, but there's nothing moving the story forward.
The other problem is the characters. On one level, I get why they're not developed well. I'm not supposed to see Drew as a character--I'm supposed to see him as *my* son, I'm supposed to project my life onto these blank slates. But there wasn't enough of a hook for me, and I found the main character really unlikable. We're led to believe he's having an affair, and then he discovers his wife *is* having an affair. And his only reaction is anger. Which, yes, he should be angry--but he could also feel sad for her. He could also feel hurt. He could feel guilt for staying out late. He could also acknowledge that someone is trying to kill them so maybe this doesn't matter right now. But, no, he just only has anger for her which is both unrealistic and makes him seem like a dick. Then later, he sees his daughter doing webcam stripteases as being worse than infidelity and heroin addiction. Again, his daughter's life is in danger. Collings is trying to make a point about a family not knowing each other as well as they think, but really it feels like a bunch of people who do not have their priorities in line and kind of deserve to be murdered.
There were certainly times I was caught up in this book. I think the revelations about the Killer have some interesting bits, and I couldn't put the book down in the final act. But I spent most of the book just hating these people and wondering when we would get to the action and being disappointed when it finally happened. Maybe this is for you. It didn't really work for me.