I recommend Dark Places. 
 Trust Gillian Flynn to twist even the most sacred of all relationships. :)) 
 To rank her novels according to my brand of creepy awesomeness: 
 1. Gone Girl 
 2. Sharp Objects 
 3. Dark Places 
 Paper clips should not be bought, among other things, according to Libby Day (and I love this about her). This kind of quirky thinking only solidify her already hardened character, that can only come from Gillian Flynn! 
 Add to that, Libby likes to lift things. As mundane as salt & pepper shakers, paperweight. Curious and curiouser, right? The complexity of her personality was amusing to discover. Libby is not likeable as a person, mind you. But she draws me in, with these little knacks that surfaced when reading her POV. 
 I daydream about dying. Patty Day has very disturbing thoughts for a mother. Can you see it?! That line alone was so fucked up to think of, when you wake up and start your day, to take care of your four kids (and you can barely get by). Patty's chapters are the most compelling, it drove me insane! (Could I think like her, if I were in her shoes? That is what I thought while I read her POVs.) 
 Ben Day's state of mind is disturbing, too dark for a fifteen-year-old. 
 Annihilation. 
 The first time that word burst from his mind, I got goosebumps.. it made me ecstatic! Right then and there, I knew it's going to be a horrifying read for me. I have no love for Ben though. The bastard was spineless and a cowardly schmuck. Libby on her bad days has bigger balls than him. 
 When that fateful day (the Days were killed) was finally recounted, the tone of the novel went to downright nasty. It was difficult not to get emotionally attached to Patty =( My insides were in turmoil, but at the same time, I was so keyed up, excited to know who the killer was... 
 And that fucker. 
 Dark Places. Gory fun. Typical Gillian Flynn insanity.