Search has become ubiquitous but that does not mean that search has been solved. Enterprise search, which is broadly speaking the use of information retrieval technology to ¿nd information within organisations, is a good example to illustrate this. It is an area that is of huge importance for businesses, yet has attracted relatively little academic interest. Searching the Enterprise explores the main issues involved in enterprise search both from a research as well as a practical point of view. It ¿rst plots the landscape of enterprise search and its links to related areas, which allows it to identify key features before surveying the ¿eld in more detail. Throughout the monograph, enterprise search is discussed as part of the wider information retrieval research ¿eld, and Web search is used as a common reference point as this is likely the search application area that the average reader is most familiar with.