Hi,
I'm a student working in continental philosophy and religion. I've recently gotten really interested in the relationship between religious and economic discourses around debt, and I've been thinking that, historically speaking, the question of usury seems like a particularly fruitful place to explore. The account of this period that I'm most familiar with is Jacques Le Goff's (via Your Money or Your Life, and Money and the Middle Ages). His account has been really helpful to me in thinking through these issues, but I want to get a broader sense for the literature on usury prohibitions in the period. I've noticed just in my own preliminary research that there aren't a whole lot of treatments that focus specifically on issues and contests around the usury prohibition, but that it features prominently (often given its own chapter) in most economically-inclined histories of the period. Which accounts of medieval economic history that deal with usury have been the most influential? Which ones would, say, a bibliography on the subject look incomplete without mentioning?
You might want to take a gander at the footnotes in Giacomo Todeschini's "Usury in the Christian Middle Ages: A Reconsideration of the Historiographical Tradition," which he has helpfully uploaded to academia.edu.
For future reference, with narrower historical topics like that and with medieval ones in particular (medievalists love to talk about ourselves), it's always worth googling [topic] historiography.
I'd don't have specific recommendations for the late middle ages, but I think it would be good to hit David Graeber's Debt: The First 5,000 Years (2011) and Peter Brown's Through the Eye of the Needle (2012). They're two books I would definitely expect in a bibliography on medieval debt.
If you want the foundations (not current), Raymond de Roover's stuff on banking is pretty classic. there have been some newer ones, but de Roover is/was a pretty big deal.