Wikis as information sources, as a form of publishing, and as tools for collaboration, are discussed in this book. The applications of wikis in library and information services, education and business are explored, with examples. The book begins with an overview of wikis, in the context of the increasing use of 'social software' in general and the trend towards a more interactive World Wide Web. The different kinds of wikis are identified and described. The advantages and problems associated with using wikis in information work and collaboration are discussed. Later chapters cover the options for creating wikis and the management of a wiki. The book concludes with lists of resources.