Welcome to the Third Edition of the Encyclopedia of Science Fiction, edited by John Clute, David Langford, Peter Nicholls (emeritus) and Graham Sleight (managing). Our aim is to provide a comprehensive, scholarly, and critical guide to science fiction in all its forms. All entries are free online.

For more about the Encyclopedia, please follow these links:

• Introduction
• Statistics
• Notes on Content
• Editorial Practices
• Editorial Practices: Checklists
• Editorial Practices: Chinese and Japanese Names
• Editorial Practices: Game Entries
• Checklist of Abbreviations
• Contributors
• Acknowledgments

• Frequently Asked Questions
• Search Tips
• Advice to Students on citations and queries