This introductory book for text and web mining utilizes only open source tools to illustrate and teach unique use case applications. Each use case consists of a fully implemented application based on a real text/web mining example. Data and clear instructions to implement the use case are provided in each chapter. Readers will investigate at least ten different tools such as R, RapidMiner, Knime, Natural Language Toolkit, Open NLP, GATE, Gephi, and ManyEyes to learn text visualization and novel techniques.