I started listening to audio books very recently, so some of these books might be old to you.

* Predictably Irrational - How Humans behave and why.

* 4 hour work week - About how to earn money to live not live to earn money

* Made to stick - How to convey ideas in a way others will remember

* Lean Startup - How to build products using continuous innovation

* Guerrilla Marketing - Basic Marketing principles in 30 days

* Rework - Myth Buster for Internet/Tech companies

* Outsider Edge - Condensed History and reasoning for success of self-made billionaires

* Linus Torvalds - Just for Fun - About Linus Torvalds

Ebooks ( haven't finished reading yet, but they are great so far )

* Getting thing Done - Management principle for knowledge workers by David Allen

* Agile Development - Building Rails apps using agile methodology

I can't believe I've finished 8 books in 2011, long live audio books.