Discusses writers such as Poul Anderson, Brian W. Aldiss, Isaac Asimov, J.G. Ballard, Alfred Bester, James Blish, Anthony Boucher, Ray Bradbury, Algis Budrys, Edgar Rice Burroughs, John W. Campbell, Arthur C. Clarke, Hal Clement, Samuel R. Delany, Lester del Rey, Philip K. Dick, Gordon R. Dickson, Thomas Disch, Harlan Ellison, Philip Jose Farmer, Randall Garrett, Robert A. Heinlein, Zenna Henderson, Frank Herbert, Damon Knight, Cyril Kornbluth, Ursula K. Le Guin, Murray Leinster, Anne McCaffrey, Judith Merril, A. Merritt, Walter M. Miller Jr., Michael Moorcock, Andre Norton, Alexei Panshin, H. Beam Piper, Frederik Pohl, Joanna Russ, Robert Silverberg, Clifford D. Simak, Cordwainer Smith, E.E. "Doc" Smith, Norman Spinrad, Theodore Sturgeon, Jack Vance, A.E. van Vogt, Kurt Vonnegut, Donald Wollheim, RogerZelazny, Jack Williamson, and others.