Translated from the French novella, and also previously released as "Lullaby," this sinister and suspenseful tale of a nanny and her two charges is a page turner. It's no mystery how it's going to end, because it starts with the ending, but the story of the seemingly-perfect (aren't they always?) Louise unfolds in flashbacks and backstory from other people's perspective.
Tight writing keeps the tense mood. Similar books that I have read recently are Gone Girl and Something in the Water. Children being involved and knowing the ending adds to the horror of the story, and makes you want to understand what drove Louise to do what she did, and if you could spot the clues to make you see that she was not the perfect nanny.