John Clute, Critic Guest of Honor at Readercon 4, was born in Canada in 1940, and has lived in England since 1969. He visits America yearly, in Maine with Elizabeth Hand. He received a Pilgrim Award from the SFRA in 1994, was Distinguished Guest Scholar at the 1999 ICFA, and received an SFWA Solstice Award in 2012.

He was Associate Editor of the Hugo-winning Encyclopedia of Science Fiction (1979) (general editor Peter Nicholls); co-edited the second edition (1993) with Nicholls, which won the Hugo, Locus, BSFA, and Eaton Grand Master Award; and is co-editor of the third edition (online 2011) with David Langford (Nicholls Editor Emeritus until his death) and Graham Sleight as Managing Editor, which won the BSFA, the Eurocon, and the Hugo.

The Encyclopedia of Fantasy (St. Martin's, 1997) with John Grant won the Hugo, Locus, Mythopoeic, Eaton Awards, and the World Fantasy Special Award: Professional. Solo he wrote Science Fiction: The Illustrated Encyclopedia (1995; Hugo and Locus winner), a companion not an encyclopedia, and The Book of End Times: Grappling with the Millennium (1999).

Book reviews and essays have been assembled in Strokes: Essays and Reviews 1966–1986 (1988; Readercon Award winner), Look at the Evidence: Essays and Reviews (1996; Locus winner), Scores: Reviews 1993-2003 (2003), Canary Fever: Reviews (2009) and Stay (2014). The Darkening Garden: A Short Lexicon of Horror (2006) argues that horror—which is to say Planetary Recognition—is central to 21st century fantastika. Pardon This Intrusion: Fantastika in the World Storm (2011) furthers this argument. His second novel, Appleseed (2001; New York Times Notable Book), is SF.

Projects: The Gaze of Attention (forthcoming September 2020): and continuing The SFE, already more than 5,000,000 words longer than the original 1979 edition, and double the length of the Third Edition on its 2011 launch.