Anyone interested in economics/finance should check out the Financial Markets class on here. It was taught by Robert Shiller, who is a pretty highly-regarded author on the subject (and also the "Shiller" in "Case-Shiller index" of home prices):

http://en.wikipedia.org/wiki/Robert_Shiller

http://www.amazon.com/Irrational-Exuberance-Robert-J-Shiller...

http://www.amazon.com/Subprime-Solution-Todays-Financial-Hap...