The Girls by Emma Cline

In late 1960's California, fourteen-year-old Evie Boyd is an only child, bored being shuttled between her divorced parents. In the summer, before heading off to boarding school, she becomes intrigued by some young women she sees hanging out in a local park. She becomes especially entranced by Suzanne--leading Evie to spend time at the commune where the women live. The cult group is lead by a man named Russell who takes control of all aspects of their lives. The Girls is closely based on the Manson family murders and is an engrossing coming-of-age story.