Post-structuralism, according to the All-Knowing Wikipedia, is associated with theorists such as Jacques Derrida, Michel Foucault, Gilles Deleuze, Judith Butler, Jacques Lacan, Jean Baudrillard, and Julia Kristeva. Wikipedia continues:
In the post-structuralist approach to textual analysis, the reader replaces the author as the primary subject of inquiry. This displacement is often referred to as the "destabilizing" or "decentering" of the author, though it has its greatest effect on the text itself. Without a central fixation on the author, post-structuralists examine other sources for meaning (e.g., readers, cultural norms, other literature, etc.). These alternative sources are never authoritative, and promise no consistency.
This is apparently typical in English literature today.