“Google Hacks: 100 Industrial-Strength Tips and Tools,” by Tara Calishain and Rael Dornfest (O’Reilly & Associates), is the latest resource in a growing industry to help people become better online searchers. It catalogs ways to uncover nuggets of information.

Other rich sources include resourceshelf.freepint.com, searchengineshowdown.com, searchenginewatch.com, and www.researchbuzz.com.