This story is creepy, claustrophobic and chilling, really nailing the horror elements. However I did find myself thinking that this book was a little overstuffed at times, adding in extra unneeded characters and red herring stories before finally revealing the true reason for Rosie's disappearance.

I wasn't sure about Will being a love interest. While Jess's family are visiting the island and lighthouse for scientific reasons, Will's family is there to... murder a couple of thousand baby birds. Which after some initial ick Jess never questions Will on.

Because of choices made in the final chapter, I did leave this story feeling like it wasn't quite finished, and it was yet another thing added to the story that felt unnecessary. I can't tell this wasn't intended for a sequel either.