I'm conflicted on how to review this one. I enjoyed the duel time lines and the setting of isolation on the island in the present time line. The idea of separated twins and amateur sleuths had me invested.
The grandmother was the real MVP for me with her sassy-ness. I will forever be calling people useless fucking dunples.
What I don't understand and maybe stop reading here in case of minor spoilers. Why did no one believe that Piper was kidnapped? I don't understand not believing Iris as a witness. 
The ending of this one ruined the book for me. In my opinion it was so unbelievable that I literally just sat and stared at it page saying WTF.
I love a twist but they have to make sense and be believable and this just wasn't the case. 

‼️ Update ‼️ After discussions with my fellow buddy reader it was noticed that Nurse Janiss has a random name change mid book. I will be updating to 2 ⭐️ now that I have sat with the story for a minute.