Although not innovative in the field of Logic itself (it closely follows Petrus Hispanus' Summulae Logicales), its insistent use by generations of Oxford students has shown it to be of great synthetic and didactic value: the Compendium continued to be read at Oxford (in Mansel's revised edition) till long past the middle of the 19th century.
In the theological field he produced his Chrysopassus (Augsburg, 1514), in which he developed a theory of predestination, while he obtained some fame as commentator on the Summulae of Peter of Spain and on Aristotle's De caelo and De anima.
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A ducal commission, appointed to find a way of ending the interminable strife between rival academic parties, asked Eck to prepare fresh commentaries on Aristotle and Petrus Hispanus.
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Other great contributors to medieval logic include Albert of Saxony, John Buridan, John Wyclif, Paul of Venice, Peter of Spain, Richard Kilvington, Walter Burley, William Heytesbury, and William of Ockham.
and is known for a number of commentaries, on Aristotle and Peter of Spain as well as on Aquinas.