An impressive volume in terms of the depth and scope. A "must have" for anybody interested in the subject, and based upon the surge of books on Hellenistic philosophy in the last decade there will be a good number of people among those "must haves." Even though it is primarily a reference book, many will want to read it from cover to cover. One disappointment, however: the editors seem to disply the usual academic prejudices against the more "wayward" Hellenistic thinkers, such as those who gave serious consideration to astrology and magic. One would expect a fuller accounting of Hellenistic astronomy, at least, if the astrology is too much for them. The volume is also surprisingly neglectful (a mere five pages) toward mathematics and its relationship to the amply treated subjects of Logic, Ethics, and Physics.