This books has multiple timelines and multiple POVs. It is consistent with Karen M. McManus's other books. It's a thriller with some fun twists and turns. The families are dysfunctional and most of the characters are pretty well developed. If you like thrillers set in the Martha's Vineyard area, you might enjoy this. If I was a teenager, I would have been obsessed. As an adult, I still enjoyed it so long as I didn't think about the logic of the resolution too much.