By William Tenn 

By Keith Roberts 

By Olaf Stapledon 

By Murray Constantine 

By Colin Greenland 

By Christopher Priest 

By Fred Hoyle 

By Robert Silverberg 

By David I. Masson 

By M. John Harrison 

By Geoff Ryman 

By John Wyndham 

By D G Compton 

By Michael Moorcock 

By John Crowley 

By Ian Watson 

By Joanna Russ 

By H.G. Wells 

By H.G. Wells 

By T. J. Bass 

By H.G. Wells 

By H.G. Wells 

By Paul McAuley 

By Christopher Priest