The serious business of fall is almost upon us: sporting events, social events, the acquisition of mums. Almost! But not today. If you need one last summertime read, you might pick up The Girls, by Emma Cline – a smart, sexy novel that’s spent most of the summer on the New York Times bestseller list. It’s the summer of 1969 and teenager Evie Boyd is bored, unhappy, and unsupervised. Her best …