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Two information professionals begin by distinguishing between the visible Web and the Invisible Web. The visible, or surface Web, contains information found by general-purpose search engines like Google. The Invisible Web is composed of more information, with some studies indicating it is 500 times larger than the visible Web. Because this material is not accessible through general-purpose search engines, it is important to learn how to access it and teach it to students. The authors examine studies compiled about research regarding use of the visible Web and then map teaching the use of the Invisible Web to the standards of ACRL (Association of College and Research Libraries, American Library Association). Discussions of instruction include concepts of Web searching, sample assignments, suggested venues for teaching, and activities. A chapter on Internet-research strategies incorporates case studies. The section on tools for searching the Invisible Web contains a selection of general-subject directories, databases, specialized search engines, and niche search engines. The final chapter examines the shifting boundaries of the visible and Invisible Web and includes descriptions of initiatives to bring both types of content more easily to searchers through common search mechanisms. Throughout the text are tables, graphics, and screen shots of detailed searches. Suggested audio and video materials available on the Web are included in Appendix B. This creditable text is a stimulating exploration of ways to teach Invisible Web research and is highly recommended for all professionals.—Rebecca Sheridan, Easttown Library & Information Center, Berwyn, PAProduct Details