This is not a “revised” edition in the sense that the original no longer works. The
typos and small mistakes have been fixed over more than 40 printings in the U.S. This
is the first major overhaul, but not for the reason you’d expect.
Things have changed dramatically since April 2007. Banks are failing, retirement
and pension funds are evaporating, and jobs are being lost at record rates. Readers and
skeptics alike have asked: Can the principles and techniques in the book really still
work in an economic recession or depression?
Yes and yes.