Dahlia Lighthouse and her siblings had an unconventional childhood, to say the least. They were homeschooled and along with geography, they were taught about famous serial killers and their victims by their obsessed parents. The way they grew up, sheltered, surrounded by historical murders, has obviously affected how they live in the world off the island and how they relate to other people.
And now three of the siblings, now adults, are back home. Dad's dead, but someone else's body is found in his grave - Andy, who they all thought ran away years ago.
So the mystery is who killed Andy. Dahlia is desperate to find out what happened to her twin. I don't know if mystery is really the right word. Yes, we have some clues and an investigation, but the book is more about the oppressive atmosphere of the Lighthouse home, of the suspicion of the other islanders, of secrets and obsession and coping.
The tone is dark and...