Book excerpt: This lively guide to the wiki phenomenon narrates the history of wikis, explains how they work, and projects the future of these collaborative, content-driven sites based on developments already under way. With lists of the most popular wikis, biographies of the key figures of the wiki movement, and a timeline of feature developments integrated into wikis today, readers will finish this book feeling confident in their ability to understand, use, and create a wiki on any subject. Also explained are the dangers of hacking, “edit wars,” and ways to stay protected from cyber-vandalism.