This groundbreaking new source of international scope defines the essay as nonfictional prose texts of between one and 50 pages in length. The more than 500 entries by 275 contributors include entries on nationalities, various categories of essays such as generic (such as sermons, aphorisms), individual major works, notable writers, and periodicals that created a market for essays, and particularly famous or significant essays. The preface details the historical development of the essay, and the alphabetically arranged entries usually include biographical sketch, nationality, era, selected writings list, additional readings, and anthologies

Volumes for 1898-1968 include a directory of publishers.