Gary K. Wolfe is Emeritus Professor of Humanities at Roosevelt University and the author, most recently, of Evaporating Genres: Essays on Fantastic Literature and Sightings: Reviews 2002–2006. He writes regular review columns for Locus magazine and the Chicago Tribune, and co-hosts with Jonathan Strahan the Hugo-nominated Coode Street Podcast.
I realize this book is now more than forty years old, but it remains one of my favourite academic treatments of science fiction. Wolfe's insights, his theory of SF as a genre structured around "barriers to knowledge"--this book is a milestone in SF criticism, something whose possible applications still have to be fully explored, and I'm in love with all of it.