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