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| Other views: | Summary Alphabetical Chronological |
| Place | Year and Award | Title | Category |
|---|---|---|---|
| Nomination | 1977 Atheling | Plumbers of the Cosmos | William Atheling Jr. Award for Criticism or Review |
| 1 | 1980 Hugo | The Encyclopedia of Science Fiction: An Illustrated A to Z | Best Non-Fiction Book |
| 1 | 1980 Locus | The Science Fiction Encyclopedia (variant of The Encyclopedia of Science Fiction: An Illustrated A to Z) | Best Related Non-Fiction Book |
| Nomination | 1991 Atheling | Fantastic World (reviews in the Melbourne Sunday Herald) | William Atheling Jr. Award for Criticism or Review |
| Win | 1993 BSFA | The Encyclopedia of Science Fiction | Special Award |
| 1 | 1994 Locus | The Encyclopedia of Science Fiction | Best Non-Fiction |
| 1 | 1994 Hugo | The Encyclopedia of Science Fiction | Best Non-Fiction Book |
| Win | 1995 Ditmar | Special Committee Award | |
| Win | 2011 BSFA | The Encyclopedia of Science Fiction, Third Edition | Best Non-Fiction |
| 1 | 2012 Hugo | The Encyclopedia of Science Fiction, Third Edition | Best Related Work |