The inspiration for this book emerged from the editors' participation in a panel d- cussion on Web search engines at an annual meeting of the Association of Internet Researchers. This multidisciplinary panel of Web search researches revealed the diversity of scholars interested in Web searching, coupled with a broad range of questions, attitudes, and approaches. It became clear that more "cross-fertilization" was necessary between the disciplines to ensure Web search engines (the entities) and Web searching (the user behavior) received the thorough scholarly attention they deserved. This book is a result of that realization, and an important first step in achieving new levels of awareness and collaboration across disciplines. The book represents a core theme within the intellectual pursuits of the editors. The first editor (Spink) is an information scientist who has worked with, taught and has researched the informational dimensions of Web searching since 1997. The second editor (Zimmer) is a scholar of culture and communication who focuses on the political and ethical dimensions of new media and information technologies, and whose dissertation research focused on the value-related consequences of the quest for the "perfect" search engine.