Sharp Objects: Gillian Flynn

This family isn't nuclear. It's toxic.
Sent to investigate the disappearance of two little girls Camille Preaker finds herself reluctantly installed in the family mansion, reacquainting herself with her distant mother and a precocious thirteen-year-old half-sister she barely knows. Haunted by a family tragedy, troubled by the disquieting grip her younger sister has on the town, Camille struggles with a familiar need to be accepted.
But as clues turn into dead ends Camille finds herself identifying with the young victims and realises: she will have to unravel the puzzle of her own past if she's to survive this homecoming.