Just finished 'sharp objects", by Gillian Flynn.
Short presentation: Camille, a young reporter from a Chicago newspaper, is sent back to her southern hometown to report on the disappearance of a young girl, following the murder of another girl the year before. This forces her back into contact with her mother, Adora, who basically rules the town, back into the trauma about the sister she lost years ago, and she gets to know her half-sister, Amma, of the same age group as the two dead / missing girls.
For context, I had already seen the TV serie (with Amy Adams as Camille), so knew what to expect. As I had found it very interesting, I went back to "the source", and it was definitly worth it.
The characters are really well described, with Camille's trauma emerging little by little in very clear images (or should I say words on her skin ?) ; Adora's and Amma's troubles are presented step by step, with clues clearly present so the end is definitly well prepared. If Adora's trouble is fairly clear from the beginning (though the scope remains to be revealed), Amma playing on her double image - and some of her words to her sister, reveal only progressively the damage.
You may sometimes want to shake some "sense" into Camille (specially a later chapter), but with her issues her behavior is largely explainable.
The last chapters particularly I could not put down, even knowing the end, as the author really made you feel this sickness, this urgency, this decay. I felt torn between deep sadness and disgust for these sick mother/daughter relationships, and the fascination of the excellent description of these relationship.
Definitly a book well written and worth reading because of the psychology, just expect to get out of there quite shaken (and in my case, thankful for a healthy relationship with my mother!)