The Paris Psalter and the Meters of Boethius (1932) contains the texts and comprehensive notes on the Paris Psalter (the most extensive collection of Anglo-Saxon metrical translations of the Psalms) and the Meters of Boethius (the surviving Anglo-Saxon versions of De Consolatione Philosophiae of Boethius.

Late Saxon and Viking Art (1949) is a lavishly-illustrated examination of the art of the Saxon era – the carvings, sculpture, illustrations, drawings and paintings that emerged from the Anglo-Saxon and Viking cultures.

The Caedmon Poems (1916) contains the texts of Caedmon’s poems, the birth of Christian poetry in England. The poems are reproduced in a modern English translation, with an extensive introduction to each.

The Viking Road to Byzantium (1976) is a major study of the Vikings who travelled east, based on the evidence of written sources and archaeology.

Anglo-Saxon Art to A.D. 900 (1972) was the first account to be written of art in England in the period of Celtic, Romano-British and Anglo-Saxon styles. Famous illuminated manuscripts, the best of the sculptured stone crosses, and many splendid pieces early metalwork are examined in this extensively-illustrated survey.

The Earliest English Poetry (1971) offers a critical survey of Old English poetry, that is, of the vernacular verse composed in England from the seventh century to the Norman Conquest. It is a studied reappraisal of Old English verse by the light of modern critical scholarship.

The Interpretation of Old English Poems (1972) is a challenging approach in the critical appreciation of Old English poems. Professor Greenfield argues in particular against two inhibiting orientations in criticism of Anglo-Saxon poetry: an insensitive and too-narrowly defined historicism, and a blinkered philological tradition.

King Alfred's West-Saxon Version of Gregory's Pastoral Care (1871) is a key Anglo-Saxon text. Preserved in two manuscripts written during Alfred’s lifetime, it affords data of the highest value for fixing the grammatical peculiarities of the West-Saxon dialect of the ninth century.