Electronic publishing can be defined as making full-texts of journal articles and books available through the network. Although e-publishing has been in existence for over 30 years in various forms such as CD-ROMs, it owes much of its current level of development to the Internet and the Web. This paper attempts to chart the evolution of e-publishing as a research field over the last 31 years using CiteSpace, an information visualization tool. It maps the intellectual structure of e-publishing based on 493 articles that appeared in professional literature on the subject between 1979 and 2009. Document co-citation and author co-citation patterns and patterns of noun phrases and keywords of papers on e-publishing are visualized through a number of co-citation maps. Maps show the major research strands and hot topics in e-publishing such as “open access” and would improve our understanding of the e-publishing as a research field.