This was a total page turner for me, I was hooked. I went into it knowing basically nothing about the story and I definitely think that's the best way. 

The basic premise is that a girl down on her luck and desperate takes a live-in housekeeper job with a rich family, but wonders what she's gotten herself into when the woman of the house starts behaving erratically.

This had some good twists and turns, with an ending that was kind of wickedly satisfying. It's definitely a popcorn thriller but I love that shit.

At the end there is an epilogue that teases the next book and I will for sure be reading it.

(Big trigger warning for gaslighting)