Out of personal interest: does Modern Macroeconomics discuss the "Monetary Disequilibrium" approach to macro?
Assuming you are referring to Austrian-style business cycle theory, the book has a chapter written by Roger Garrison on the subject. While the theory might not be applicable in general, he make a good case that a boom/bust cycle could be generated by credit expansion.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.