This is the fifth edition of a leading selling college-level book for Internet research courses. Examples have been chosen to appeal to a broad spectrum of students and researchers across academic disciplines. It is much more than a catalog of search engines and their features. Both the free and fee-based (hidden) Internet is explored. The focus is on formulating search strategies, understanding how to form search expressions, evaluating information, and citing resources. Librarians, prospective and in-service K-12 teachers, and majors in business, math, or the sciences will benefit from it.