Internet has become the most important source of information for us. However, it is very hard to find the exact information we are looking. The primary reason behind this is nature in which information is available on the internet. To gather complete information a person has to read through many document available on the internet. Most of the content in all these documents are same. Have you ever thought how much time and energy you would save if you get all the information on click of a button rather than searching it in multiple documents? This is possible through document summarization. The book provides a new approach of document summarization using incremental PLSA technique which is much faster in summarizing documents then the traditional approach. The book is useful to professionals working in the area of R&D field or anyone who is trying to optimize the time spent on gathering information from multiple documents either online or offline.