Reddit mentions of Duns Scotus - Philosophical Writings: A Selection

There's the Ordinatio, which I believe is a revised version of his commentary on the Sentences. That's probably his main work. Then there are a few lectures, disputed questions, the questions on Aristotle's Metaphysics, and the Paris Reportatio (lectures recorded by his students).

You can find some of these titles here, though they're fairly expensive: https://www.franciscanpublications.com/collections/john-duns-scotus

The following contains excerpts mostly from the Ordinatio I believe and would probably be the best intro volume: https://www.amazon.com/Duns-Scotus-Philosophical-Writings-Selection/dp/0872200183/ref=sr_1_1?keywords=john+duns+scotus&qid=1556720505&s=gateway&sr=8-1

Selections on ethics: https://www.amazon.com/John-Duns-Scotus-Selected-Writings-dp-0199673411/dp/0199673411/ref=mt_paperback?_encoding=UTF8&me=&qid=1556720505

Collection of Quodlibetal Questions: https://www.amazon.com/God-Creatures-Quodlibetal-Questions-Princeton-dp-0691618038/dp/0691618038/ref=mt_paperback?_encoding=UTF8&me=&qid=

A portion of the Ordinatio: https://www.amazon.com/gp/product/0823270734/ref=ox_sc_saved_title_7?smid=ATVPDKIKX0DER&psc=1

The following book is good about clearing up some caricatures and misunderstandings of Scotus by certain Thomists and postmodernist theologians: https://www.amazon.com/Postmodernity-Univocity-Critical-Account-Orthodoxy/dp/1451465726/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=1556720505&sr=8-11

You might also check out this blog on Scotus: http://lyfaber.blogspot.com/