A dark, twisty book that I absolutely loved!

Anna is driving three colleagues back from a work retreat and they get into a car accident. Two of her colleagues die and the other is injured. She feels a lot of guilt over what happened so decides to move to work at a hotel on a remote Scottish island for a fresh start.

Before she left, she was receiving eerie messages which continue even after she moves. You suspect every person staying at the hotel and the twists and turns are great.