In 1839 the "Tractatus Coislinianus", a summarised treatise on comedy, was published from a tenth-century manuscript. Its discoverer suggested that it derived from the lost second book of Aristotle's "Poetics", which inaugurated the systematic study of comedy, but it was soon condemned as an ignorant compilation verging on forgery, and thus matters stood until the first publication of "Aristotle on Comedy" in 1984. Richard Janko's edition of the text is accompanied by a facing translation, interpretive essays, reconstruction and commentary. This edition contains a new preface and additional bibliography.