Kuno Renatus 
The Twelfth Hour of Capitalism [PDF ebook] 

First published in 1932. In this book, a well-known German authority on economics analyzes the present world situation and points the way out. His contention is that reparations are not in themselves enough to account for the crisis, which is rather due to the burden of interest that is being paid one way and another on the money sunk unproductively in the World War.