Once you've gotten your bearings in steps 1-3, secondary sources are a great place to begin your research and help you save time locating the right primary authorities. It is often difficult to quickly find answers in statutes, cases or other primary sources; in fact, cases often assume a reader has some background knowledge.
Secondary sources can explain legal principles more thoroughly, and point to key terminology and terms of art.
treatise: a book or multi-volume set, describes an entire area of law, with references to statutes and key cases (e.g., Farnsworth on Contracts)
legal encyclopedia: multi-volume set, describes all major areas of law for a given jurisdiction (e.g., Cal. Jur. 3d, topic on Insurance Law)
practice guide: practitioner-oriented, discusses a particular area of law (e.g., Rutter Group guide on Employment Litigation) or stage of a legal process (e.g., CEB guide on California Civil Procedure Before Trial)
law journal/review: scholarly article, source; often provides detailed, critical or theoretical examination of a specific legal question or a new case or statute
restatement: highly regarded distillations of common law covering broad topics (e.g., Restatement (Third) of the Law: Contracts), attempting to "restate" common law into a logical series of principles or rules; may help frame issues into a legal question and suggest key terms.
study aids: introductions such as nutshells, outlines or other overviews (e.g., Tort Law in a Nutshell or Emanuel’s Criminal Law outline) also offer background information and key terms, although they may provide fewer leads to primary sources.
Don't know where to find discussion of your issues? Look for:
Table of Cases - look up a case you know is relevant in this alphabetic list by party name
Table of Statutes - look up a statute you are starting from in this listing by statutory code topic and section number
Index - try the keywords you generated; the index may refer you to a relevant discussion or cross-refer you to other terms relevant to your issue
Table of Contents - skim the detailed table at the beginning of many treatises and practice guides or encyclopedia topics to see if you can figure out the context of your issue
Witkin's encyclopedias (four sets: Summary of California Law, California Procedure, California Evidence and California Criminal Law)
California Jurisprudence, Third Series (Cal. Jur. 3d)
Some well-known California-focused practice guides:
American Jurisprudence, 2d ed. (AmJur)
Corpus Juris Secundum (CJS)
American Law Reports (ALR and ALR Fed for federal topics): in-depth “annotations” on narrow topics, with background, analysis
, and citations to relevant cases, statutes, law review articles, and other ALR annotations.Moore’s Federal Practice - Civil: practice guide on civil procedure, appellate procedure, etc.
Nimmer on Copyright: a leading treatise on copyright law
Rutter Group federal practice guides: