This book illustrates the concepts and applications of web mining from the nature of web data sources to discovering and representing the extracted knowledge. Starting with an overview of data mining, it introduces web mining and draws comparisons between data mining and web mining. After this introduction the book covers data sources, categories and classes of web mining, including the subfields of Web Structure Mining, Web Usage Mining and Web Content Mining. it incorporates practical methods of analysing various web data sources and extracting knowledge by taking into consideration the unique challenges and multidisciplinary and novel approaches needed. Key Features: Focus on web mining applications in knowledge discovery in databases. Includes techniques and applications. Accompanying code and data sets Reviews present state of play and future challenges