26 possibilities: Isaac Asimov Alfred Bester Arthur C. Clarke David Brin Octavia E. Butler Philip Jos� Farmer Gregory Benford Frank Herbert Samuel R. Delany Jerry Pournelle Mickey Spillane Ursula LeGuin Stanislav Lem William Gibson Olaf Stapledon Philip K. Dick Hal Clement Robert A. Heinlein E.E. "Doc" Smith James Tiptree, Jr. Jules Verne Kurt Vonnegut H.G. Wells Cordwainer Smith Ayn Rand John Brunner
no subject
Isaac Asimov Alfred Bester Arthur C. Clarke David Brin Octavia E. Butler Philip Jos� Farmer Gregory Benford Frank Herbert Samuel R. Delany Jerry Pournelle Mickey Spillane Ursula LeGuin Stanislav Lem William Gibson Olaf Stapledon Philip K. Dick Hal Clement Robert A. Heinlein E.E. "Doc" Smith James Tiptree, Jr. Jules Verne Kurt Vonnegut H.G. Wells Cordwainer Smith Ayn Rand John Brunner