My recommendation to Ms. Murphy would be have an American editor read through her books before publishing in USA. BUT since her main character, Paige, is British, she feels it is fine for mistakes to be made. I guess the part I dislike the most is that Ms. Murphy suspends so many common elements of teen life to try to make this plot line work.

Paige not having a strong friend group
Parents that seem out of touch and conveniently always absent
Killer who manages to sneak into the house and watch Paige sleep
Not enough clues to lead us to who turns out the be the killer

The character in this book felt very one dimensional, and the plot was very basic and formulaic. It was entertaining, but also very surface level.