If you are uninterested in actual NEW (zounds!) economic ideas, analysis, and policies then please ignore the rest of this post.  I make this point only because I've been bitten too many times over too many years by people claiming they want new ideas when what they really want are their old concepts in a fancy new wrapper.

Books:

Technical

Santa Fe Institute: Studies of Complexity Addison-Wesley.

Vol. V The Economy as an Evolving Complex System. P. W. Anderson, K. Arrow, D. Pines.  1988.

Vol.XIX Complexity: Metaphors, Models, and Reality. G. Cowan, D. Pines, and D. Meltzer. 1994.

Popular

Complexity: The Emerging Science at the Edge of Order and Chaos. M. Mitchell Waldrop. Simon and Schuster, New York, London, & etc. 1992.  

Complexification: Explaining a Paradoxical World Through the Science of Surprise.  John L. Casti. HarperPerennial, New York. 1995.

Chaos: Making a New Science. James Gleick. Penquin Group, London, & etc.  1987.

Websites

Steve Keen author of Debunking Economics.  I wish to particulary draw your attention to this article.  I suggest someone who can speak or read French (not me, alas) get in touch with the PAE.

There is a link to Paul Omerond's (Death of Economics, Butterfly Economics)website in the above but I'm going to break it out a specific link for emphasis.  

It is time and past time for us, the Left, to move into the 21st Century and junk the intellectual stagnation from the bloody-be-damned fixation with the 19th Century.  

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre