Pay-Per-Click Search Engine Marketing Handbook: Low Cost Strategies for Attracting New Customers Using Google, MSN, Yahoo & Other Search Engines
What I like about this book is it does not just stick with Google Adwords. It also explores MSN and other services. Google Adwords it good, but for my money there are better places to spend your ppc money with better results.
Business, Economics, Marketing, Advertising, Promotion, SEO, PPC