A definitive must read about how the internet is changing markets, the future of marketing, and how should companies adapt if they don’t want to be left aside: the cluetrain manifesto

A powerful global conversation has begun. Through the Internet, people are discovering and inventing new ways to share relevant knowledge with blinding speed. As a direct result, markets are getting smarter—and getting smarter faster than most companies.

You can read the whole book online for free.