Janis Joplin poses at home in San Francisco in 1967. "Janis lived around the corner, so I'd go over to her house and shoot some pictures," photographer Baron Wolman says. "Janis had a dark side and a light side. I worked hard to get the light side. This one was the exception, this is the dark side. There was part of her that was kept hidden by all sorts of demons that she faced in her life."