An Apology for Poetry (or The Defence of Poesy), by the celebrated soldier-poet Sir Philip Sidney, is the most important work of literary theory published in the Renaissance. The new introduction and notes include a wealth of new information and new readings drawing on recent developments in Renassance Studies. Unfamiliar words and phrases are glossed, classical and other references explained, and difficult passages analysed in detail. The first separate edition of Sidney's seminal text to be published for more than a decade. Since 1965 Geoffrey Shepherd's edition of the Apology has been the standard, and this revision of Shepherd's edition, with a new introduction and extensive notes, is designed to introduce Sidney's best-known work to a new generation of readers at the beginning.