Medieval and Early Modern Coinage and Its Problems
papers.ssrn.com
papers.ssrn.com
I much preferred Anathem for this reason, when he's writing about another world he's not polluting the real history of this one. In a sense Neal Stephenson's novels that are set in apparently historical contexts are a little like later chapters in "the book" from Anathem
Another interesting paper by Meir Kohn, this one about the evolution of the bill of exchange: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=151849
The throwaway line that richard the lionheart was ransomed for 100,000 pounds of silver, 5 times his annual income, is brilliant.