- *Under Strange Stars: The Many Worlds of Science Fiction* (1994)
- *Solaris* (2006)
- *Science Fiction: A Complete Introduction* (2010)
- *The Pocket Essential Science Fiction* (2011)
- *Distant Worlds: The Science Fiction of Philip K. Dick* (2015)
- *Philip K. Dick: Contemporary Critical Perspectives* (2017)
- *Understanding Philip K. Dick* (2019)
Short Stories
- "The Dreaming Stars" (2006)
- "The Time Traveler's Wife" (2007)
- "Nightfall" (2008)
- "Do Androids Dream of Electric Sheep?" (2009)
- "Neuromancer" (2010)
Essays and Articles
- "Science Fiction and the Future" (1994)
- "The Science Fiction of Philip K. Dick" (2000)
- "Solaris: A Masterpiece of Science Fiction" (2006)
- "The Legacy of Philip K. Dick" (2010)
- "The Future of Science Fiction" (2015)
Critical Editions and Introductions
- *The Dream-Quest of Unknown Kadath and Other Stories* by H.P. Lovecraft (2007)
- *Do Androids Dream of Electric Sheep?* by Philip K. Dick (2008)
- *Neuromancer* by William Gibson (2010)
- *Solaris* by Stanisław Lem (2011)
- *Fahrenheit 451* by Ray Bradbury (2012)