Jay Conrad Levinson, Amy Levinson, Jeannie Levinson - Guerrilla Marketing: Easy and Inexpensive Strategies for Making Big Profits from Your Small Business

If you own a business or are thinking of this book is a great tool to have under your belt. I've applied many of the keys from this book to my belt.
It is pretty long and is more of a call to action then a sit back and learn something book. It will get you motivated or it will discourage you get overwhelmed by projects.