Very sad and suspenseful

Sisters Autumn and Ivy lead very different lives: Autumn is angry and deals drugs, and Ivy is a nerdy band member with a small group of friends. Their story is sad, intriguing, and realistic. I couldn't stop reading, and I want to find out what happens next. I believe the cover captures the atmosphere and danger of the story perfectly, and the excerpt left me on one whale of a cliffhanger.