Coming out in paperback, March 2010, for only $20. You can pre-order now.
Mostly it's Black's views on business cycles, growth, and equilibrium. It's not an easy book for most people to read, as Black just comes out and states what he thinks, without much in the way of trappings or preliminaries or traditional narrative structure. There are also no models, just strings of statements about models. That said, virtually every sentence has substance. It is one of my favorite books in economics and it still contains many unmined insights. I'm tempted to order an extra copy, just for the pleasure of buying it.