Canary Fever is a collection of reviews about the most significant literatures of the twenty-first century: science fiction, fantasy and horror: the literatures Clute argues should be recognized as the central modes of fantastika in our times. The title refers to the canary in the coal mine, who whiffs gas and dies to save miners; reviewers of fantastika can find themselves in a similar position, though words can only hurt us.

This is the fourth such collection by John Clute. Several older pieces are included here, though the great bulk of the book - over 200,000 words - was first published between 2003 and 2008. Every review has been edited. Errors and incoherencies have been removed when possible. The original versions of some reviews - in particular those written in the past year or so - have been treated as first drafts, and have been brought into final form.
One piece, on John B Watson and Behaviorism, is previously unpublished.