Back in 2010 when I started this blog I wrote a short piece called "The Role of Squirrels in the Economy." It describes why sound means of savings are critical to the economy:
http://thesilversquirrel.blogspot.com/2010/06/critical-role-of-squirrels-in-economy.html
Also, Irwin Schiff's classic book "How an Economy Grows and Why it Doesn't" is a great primer on the basics of capital formation from an Austrian economics perspective:
And here is a great comparison of Keynesian vs. Austrian economics, featuring Irwin Schiff's son, Peter Schiff:
Austrian Theory of the Trade Cycle:
Capital and Interest Rates:
Modern Banking: Creating Booms and Busts
Defending the Saver: