Library 3.0 offers a fresh, optimistic but balanced look at the potential of the social networking tools focusing on the characteristics of the dotcom user and the role of librarians as Apomediators. Apomediation refers to the supporting role librarians can give users by stepping in when users need help. This title analyses Library 3.0 and its potential in creating intelligent libraries capable of meeting contemporary needs, and the growing role of librarians as apomediators.