Book excerpt: In Ray Bradbury Unbound, Jonathan R. Eller continues the story begun in his acclaimed Becoming Ray Bradbury, following the beloved author's evolution from a short story master to a multi-media creative force and outspoken visionary. At the height of his powers as a poetic prose stylist, Bradbury shifted his creative attention to film and television, where new successes gave him an enduring platform as a compelling cultural commentator. His passionate advocacy validated the U.S. space program's mission, extending his pivotal role as a chronicler of human values in an age of technological wonders. Informed by many years of interviews with Bradbury as well as an unprecedented access to personal papers and private collections, Ray Bradbury Unbound provides the definitive portrait of how a legendary American author helped shape his times.