The publisher John Calder began the Opera Guides series under the editorship of the late Nicholas John in association with English National Opera in 1980. It ran until 1994 and eventually included forty-eight titles, covering fifty-eight operas. The books in the series were intended to be companions to the works that make up the core of the operatic repertory. They contained articles, illustrations, musical examples and a complete libretto and singing translation of each opera in the series, as well as bibliographies and discographies.

The aim of the present relaunched series is to make available again the guides already published in a redesigned format with new illustrations, many revised and newly commissioned articles, updated reference sections and a literal translation of the libretto that will enable the reader to get closer to the intentions and meaning of the original. New guides of operas not already covered will be published alongside the redesigned ones from the old series.