We kindly ask our patrons to bear in mind that there are two parallel editions of St Gregory Palamas' Homilies/Sermons. The first edition, Saint Gregory Palamas: The Homilies, is intended for the student of theology -- hardbound, with an introduction, detailed notes, indexes, etc. However, because MTP sees it as its raison d'être to make St Gregory available to a wider readership, we also offer this vast treasure of Orthodox theology and the spiritual life in another form.
Therefore, we also have a second edition, the series entitled, Sermons by Saint Gregory Palamas, which is a collection of many of the same homilies arranged thematically and without the notes, indexes, etc. It is hoped that this series, with its modestly priced volumes, will help to introduce the reader to the faith of the Fathers of the Church, and make St Gregory, and through him knowledge of the Orthodox spiritual life, available to a wider public.
A possible source of confusion stems from the fact that originally The Homilies began as a three-volume series -- only two volumes of which were actually published (in 2002 and 2004: there is no volume 3) -- but owing to a certain conjunction of circumstances, this has now been superseded by the abovementioned single-volume hardbound MTP edition of all sixty-three extant homilies.
Hence, Saint Gregory Palamas: The Homilies, includes the material that would have formed volume three of the originally intended series, and is, moreover, a revised edition of the entire corpus.