- St Isaac of Nineveh. On Ascetical Life. Edited by John Behr. Translated by Mary Hansbury. Vol. 11. Popular Patristics Series. Crestwood, NY: St Vladimir’s Seminary Press, 1989.
- Hodgson, Peter Crafts, and Robert Harlen King, eds. Readings in Christian Theology. Minneapolis, MN: Fortress Press, 1985.
- Wensinck, A. J. with Isaac of Nineveh. Mystic Treatises. Amsterdam: Koninklijke Akademie Van Wetenschappen, 1923.
What additional Logos functionality am a paying for when even milestones are missing for this work? The milestones allow me to find multiple translations, allow me to use the text comparison tool, allow me to look up references to the work in other books … In short, the "research" part is missing from "Logos Research edition".
More generally, works that are considered authoritative i.e. canonical but no scriptural, need to have the basic functions that milestones provide to meet the needs of your users.