He wishes to borrow the title and make a separate observation by looking at the stories as told in the two books- "Lords of Finance" and "The Alchemists".
First, the two stories share the following common backdrops:
1. both are examining a major financial crisis- in the former, the Great Depression of 1929 and the latter, the Great Recession of 2008;
2. the central players (or at least the official positions of the central players) are, except that there was one additional protagonist in the former, are exactly the same; central bankers from the USA, France and UK;
The central messages, despite the common backdrops, could not have been more different in the two books.
In the former (i.e. the Lords of Finance), the author asserted that the economic crisis that followed was the result of the economic policies that these central bankers helped to shape.
Whereas in the latter (i.e. The Alchemists), its author tried to convince his readers that the same group of people were the ones the mopped up the mess that followed the collapse of Lehman Brothers and returned the house of international financial system to a state that resembled normalcy.
As a keen observer of the development of monetary policies and the making of, this shopkeeper reconciles the seemingly contrasting portrayals of central bankers' roles in financial crises by observing that, like virus and antidotes, they are both sides of the same coin (pun intended :)