Introduction to Information Retrieval is the first textbook with a coherent treatment

of classical and web information retrieval, including web search and

the related areas of text classification and text clustering. Written from a

computer science perspective, it gives an up-to-date treatment of all aspects

of the design and implementation of systems for gathering, indexing, and

searching documents and of methods for evaluating systems, along with an

introduction to the use of machine learning methods on text collections.