Satisfied Customers Tell Three Friends, Angry Customers Tell 3,000: Running a Business in Today's Consumer-Driven World Required reading for any business today
Once You're Lucky, Twice You're Good: The Rebirth of Silicon Valley and the Rise of Web 2.0 Interesting history about entrepreneurs who contributed to the rise of Web 2.0
Word of Mouth Marketing: How Smart Companies Get People Talking An easy to read book by the founder of the Word of Mouth Marketing Association