Critical Theory (Standford Encyclopedia of Philosophy)
Introductory Guide to Critical Theory
Illuminations: The Critical Theory Web Site
Critical Theory A-Z
Introduction to Modern Literary Theory
Literary Theory (Voice of the Shuttle)
John Hopkins Guide to Literary Theory & Criticism
Literary Theory (Rice University)
Application of the Critical Theory

The Norton Anthology of Theory and Criticism by Vincent B. Leitch
Literary Theory: An Introduction by Terry Eagleton
After Theory by Terry Eagleton
The Function of Criticism by Terry Eagleton
Introduction to Critical Theory: Horkheimer to Habermas by David Held
Critical Theory, Marxism, and Modernity by Douglas Kellner
Beginning Theory: An Introduction to Literary and Cultural Theory by Peter Barry
Literary Theory: A Very Short Introduction by Jonathan Culler
Literary Theory: An Anthology by Michael Ryan
Literary Criticism: An Introduction to Theory and Practice by Charles E. Bressler
A Glossary of Literary Terms by M. H. Abrams
The Mirror and the Lamp: Romantic Theory and Critical Tradition by Meyer H. Abrams