In this paper, a novel interdisciplinary approach to literary phenomena is proposed. I call this approach “expanded literary theory”. The expanded literary theory is a framework for research and practice that intends to develop an integrated model of literary phenomena with cognition, text, and institution by the fusion of literary theories, narratology, cognitive/computational science, and social sciences such as management and marketing, and aims at the dynamical analysis of literature, the experimental creation and practice of new literary genres. Here, after I describe the concept and objectives of the expanded literary theory, I consider its methodology and some trials.