As the Web grows increasingly vast, more and more information sources are becoming available to information professionals: virtual libraries, e-journals, bibliographic databases and more. Users of the Web must not only be aware of what information is out there but also how they can find it quickly and retrieve the precise information they need. Learning about these sources and mastering information retrieval is essential for information professionals if they are to make the most of what the Web offers. This comprehensive companion volume to the authors\' book \"Searching CD-ROM and Online Information Sources\" offers a thorough overview of the various information sources and services available on the Web and the corresponding tools and techniques required to search and retrieve the information effectively. Topics covered include: the Web and its underlying technology; search engines offering search and retrieval features; directories; Web-based reference and information services; electronic journal resources and e-books; virtual library resources and subject gateways; digital library collections; search techniques; issues and trends in the field of Web information searching. With examples and screenshots, the book is designed for students of library and information studies, as well as any information practitioners wanting to learn how to use and get the best out of the many information sources and services on the Web.