Incredible characterization, spot-on depictions of the teen and pre-teen protagonists, and a riveting story. Yes, it's a bit slow at times, but in a weird way that's part of the book's appeal. It's not a race to the finish but a careful unwrapping of the layers within layers of this mystery. I was reminded of Stranger Things at times, interestingly. Yet despite some supposedly supernatural elements, Tremblay”s story is a very real one with a very real resolution.