SAN DIEGO — For author Swan Huntley, the truths embedded in her third and latest novel were not stranger than fiction. But they were just as dramatic as anything she could have made up. Like the heroine of “Getting Clean With Stevie Green,” Huntley grew up in La Jolla, California, where the beauty and ease of her outer life did not match the turbulence of her inner life. Like Stevie, Huntley was a teenaged Dr. Jekyll and Mr. Hyde, taking all the right classes and making all the right friends at La Jolla High School, while also drinking, taking drugs and hooking up with guys she didn’t know. An…