once upon a time in the sf world there be only novel . then come Editor John Campbell and do he manage a field of great author ! Asimov , Heinlien , Clarke , and many other grow up under he .  in we modern era , science fiction have once again fall prey to 10 novel fantasy series and the -lrb- ... -rrb- EMPIRE of Star Wars and Star Trek book -lrb- I hesitate to call they novel -rrb- .  Asimov 's Science fiction be the bright shine light where fabulous sf be be write by writer that have not sell out to the Motion Picture megabuck . not that these story would not make great movie , many would , but editor Gardner Dozois demand excellence and get it .  the writer in ASF write sf the way it should be , with the science of today extrapolate into the future .  way to go and suscribe to this magazine