Discover how one of the world's youngest billionaires created Facebook, and how Mark Zuckerberg was able to turn it into a global money-making business. Find out how he has coped with criticism and praise, and continued to work to improve Facebook for its users.

The many faces of Facebook -- A child of the computer age -- Off to Harvard -- The summer holiday that never ended -- Facebook's growing challenges -- Zuckerberg's changing role -- Mark Zuckerberg today -- How to become an entrepreneur -- The Zuckerberg effect -- Glossary.