American Jurisprudence 2d (Am. Jur. 2d) (green)
Corpus Juris Secundum (C.J.S.) (dark blue)
Both legal encyclopedias:
Am. Jur. 2d is updated with pocket parts and occasional replacement volumes. C.J.S. is updated through 2009.
Be patient with the index.
Watch the dates. Some volumes are 30 years old; others were revised within the last few years. Be sure to check pocket parts for new material.
Full-text searching (either natural language or with Boolean connectors) can be powerful, but take advantage of the online tables of contents to browse.
American Law Reports contain selected, illustrative cases, accompanied by "Annotations," which are articles summarizing legal issues and noting cases from around the country.
A.L.R. is on both LexisNexis and Westlaw, from the second series on.
Since Thomson Reuters (Westlaw's parent company) produces the set, it is more current on Westlaw. Only Westlaw has the index online.