Lois McMaster Bujold (Modern Masters of Science Fiction) (Champaign IL: Illinois University Press, 2015).
Ed., with Farah Mendlesohn, The Cambridge Companion to Fantasy Literature (Cambridge: Cambridge University Press, 2012). Short-listed for a Hugo Award, Best Related Category, and for a Locus Award, Non-Fiction.
with Farah Mendlesohn, A Short History of Fantasy (London: Middlesex University Press, 2009).
Ed., with Farah Mendlesohn, The Cambridge Companion to Science Fiction (Cambridge University Press, Cambridge, 2003). Winner of the Hugo Award, Best Related Category, in 2005.
Ed., with Andrew M. Butler and Farah Mendlesohn, Terry Pratchett: Guilty of Literature (Science Fiction Foundation, Reading, 2000), 184pp. Short-listed for a Hugo Award, in the Best Related Category.
Ed., with Farah Mendlesohn, The Parliament of Dreams: Conferring on Babylon 5 (Science Fiction Foundation, Reading, 1998), 178pp.
Science Fiction in the Twentieth Century (Oxford University Press, Oxford, 1994), 250pp. Awarded the Eaton Award of the University of California, for the best critical work on sf.
Ed., with Maxim Jakubowski, The Profession of Science Fiction: SF Writers on their Craft and Ideas (Macmillan, London, 1992)
Index to Foundation 1-40 (North East London Polytechnic 1988), 108pp.