I mention on the page on books that influenced my thought one book by Richard Koo: The Holy Grail of Macroeconomics: Lessons from Japan’s Great Recession. Koo has written other interesting things, which are slightly unorthodox but at the same time very pragmatic. E.g. this older paper (2012) on a solution to the Eurocrisis: ‘eurozone governments should limit the sale of their government bonds to their own citizens.’
I haven’t seen this idea much discussed, and it goes against the idea of ‘free capital markets’, but that might be a very good thing actually.