What is Information Science? This comprehensive book answers this key question by providing a detailed definition and analysis of information science and how it differs from data science and library science. Drawing on a range of practical examples, the book explores how information science uniquely cuts across disciplines and integrates different streams of information into a coherent whole that makes sense for a particular problem. Starting with a historical overview of information science, subsequent chapters explore: Communication tools; Information integrity and behaviour; Artificial intelligence and data science; Information retrieval, curation and non-verbal information; Information in technology, education and politics. A core text for those teaching library and information science as well as practising librarians or those working in information and communication fields, Information Science is an authoritative and subject-defining publication.