Not a bad read, it did keep me reading and wondering what was going on but the time travel aspect didn't work for me.
Spoilers abound and I will try to keep them under wraps to a degree but I can't talk about the problems without them.
Connie Lacey copes with the trauma of being cut up and watching her mother being killed in front of her and being stalked and taunted by her stalker by running. Now she's offered an opportunity to go to to the Island Corazon to a family gathering, a family she knows very little about, and to have a month away from her cares, she hopes. When she gets there she starts to feel like the place is familiar, is very attracted to the island's owner, Sylvester, but things start to go wrong and suddenly the past is catching up with the present. She knows some of the people here but some of the others are strangers.
They all get trapped and then bodies start to accumulate.
It's the lovechild of Ten little Niggers /Ten little Indians /Then there were none and The Time Traveller's Wife and/or Outlander, with bonus reincarnation, and ghosts! If it was me I'd be inclined to be a little less passive, but she's not me.
The spoilery stuff:
Basically he has been immortal in order to send himself back in time to found his own dynasty and the people who were on the island, but she travels back too, and if she does that he ages and she disappears from continuity, so she could never have been born if he wasn't immortal and he stops being immortal when she returns to him and my brain almost exploded from how messed up it all was.
And again with people who are vaguely immortal or long-lived he doesn't show the smarts he should from a long life, it's one of my bugbears with long-lived characters where stupid will probably get you killed.
Falls into ghosts, supernatural, Country House Mystery, murder most foul, romantic suspense, serial/spree killer, probably gothic, haunted houses (basically the island is haunted); monsters, terrifying women. I'm going to use Haunted Houses, edited because I discovered I'd used ghosts.