If you are interested in owning all four volumes, be warned that Chicago UP at present does not seem interested in releasing Vol. 4 separately. Vols. 1 (Aeschylus), 2 (Sophocles), and 3 (Euripides part I) are available individually in new, hardcover versions -- but good luck tracking down a new, 1992 edition of Vol. 4 (Euripides part II)! If there were only minor Euripidean works (an oxymoron, I know) in part II that might not be a problem, but Vol. 4 includes such plays as "Electra," "Orestes," and "The Bacchae." I'm not sure it's worthwhile to buy the first three volumes separately and then hunt around for the remaining plays in a different format (note the sad voice of experience here.) I wrote Chicago UP inquiring as to whether Vol. 4 by itself might be making an appearance soon; I am still waiting after two years for an answer ...