Sphere science fiction
Series de Isaac Asimov
Libro sin clasificar
Isaac Asimov, Eric Frank Russell, Murray Leinster, Avram Davidson, Poul Anderson, Gordon R. Dickson, Arthur C. Clarke, Larry Niven, Samuel R. Delany, Philip José Farmer, Robert Silverberg, Clifford D. Simak, Jack Vance, Fritz Leiber, Walter M. Miller Jr., Daniel Keyes, Harlan Ellison, Anne McCaffrey, Robert Bloch: The Hugo winners Volume 1 1962-1967 (1973, Sphere)
The Hugo winners Volume 1 1962-1967
por Isaac Asimov, Eric Frank Russell, Murray Leinster, y 16 otros
Libro sin clasificar
Isaac Asimov: Pebble in the Sky (Paperback, 1977, Sphere)
Pebble in the Sky
por Isaac Asimov