Why didn't more investors see the mortgage meltdown coming? How did a doctor turned value investor get rich off credit default swaps? What steps need to be taken to fix Wall Street and restore confidence in investment banks like Deutschebank (NYSE: DB) and Goldman Sachs (NYSE: GS)? In this 15-minute audio interview, The Motley Fool's Chris Hill asks these questions of Michael Lewis, author of The Big Short: Inside the Doomsday Machine.

Neither Mac nor Chris owns any of the stocks mentioned above. The Motley Fool has a disclosure policy .