Originally published in 1985, the various chapters in this volume give examples of research on all three aspects of text understanding - namely, structure, world knowledge and process. More than this, however, the research described represents a shift in emphasis from studying stories, which dominated the field in the late 1970s, to studying expository text. This focus on stories was probably due to the essential first step in any science of examining the simplest materials possible. However, the editors thought that it was time to shift the research focus from stories to expository text and this volume is their attempt to provide this transition.