Livres comme Worlds enough and time
Autres livres de Gary Westfahl
The Encyclopedia of fantasy1997
The Greenwood Encyclopedia of Science Fiction and Fantasy2005
Immortal Engines1996
Cosmic engineers1996
Space and Beyond2000
Hugo Gernsback and the Century of Scienc Fiction (Critical Explorations in Science Fiction and Fantasy) (Critical Explorations in Science Fiction and Fantasy)2007
Arthur C. Clarke2018
Mechanics of Wonder1998- Science fiction and the two culturesScience fiction and the two cultures2009
Science fiction, children's literature, and popular culture2000- Hugo Gernsback and the century of science fictionHugo Gernsback and the century of science fiction2007
Sense-Of-Wonderful Century2012