Science Fiction Literature through History [2 volumes]Gary Westfahl · First published 2021Open the Tome
The Greenwood Encyclopedia of Science Fiction and FantasyGary Westfahl · First published 2005Open the Tome
Science fiction, children's literature, and popular cultureGary Westfahl · First published 2000Open the Tome
The Encyclopedia of fantasyJohn Clute, John Grant, Michael Ashley, David G. Hartwell, Gary Westfahl · First published 1997Open the Tome
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