The cover is awesome so I had to read this. The prologue starts out a little weak and confusing, you can skip to chapter one. From there it's good, if you are in the mood for a 1st person teenage girl POV, and a story of one summer during which there is character growth, atonement, and sister bonding. Anna is unhappy with her home situation so she steals her mom's credit card and gets on a plane to visit her sister, an actress in L.A. 
 Anna is researching the Manson girls for a project. Besides the California setting, the tie-in works because Anna reflects on that they were regular girls who ruined their lives with bad choices, and she wanted to start making better choices. 
 The tone is snarky, and it only crossed the line once--there is a flip remark about herpes. I don't have herpes but it sounds horrible, and the remark was a little disturbing--a young woman (who didn't have it) described it in a gross way and was like: it's not big deal, right? It wasn't a joke, I would prefer a joke, jokes are funny and help people cope. It was just kind of gross. Moving on. 
 There is humor in this book, a good storyline, and some nice writing at the end. The book consistently got better from beginning to end. It got less snarky and more substantial-- this mirrors main character Anna's growth.