But Gunn has also been one of the genre's leading writers. His classic novels Star Bridge (with Jack Williamson), The Joy Makers, The Immortals and The Listeners helped shape the field. Now in his nineties, he remains a prominent voice. His forthcoming novel is Transformation. Drawing on materials from Gunn's archives and personal interviews with him, this study is the first to examine the life, career and writing of this science fiction grandmaster.