[1] Casebooks sometimes also contain excerpts from law review articles and legal treatises, historical notes, editorial commentary, and other related materials to provide background for the cases.
Such casebooks are often known by the names of the leading professor authors, such as Prosser, Wade, & Schwartz's, Torts: Cases & Materials (now in a 13th edition).
[3] For more straightforward and current summaries of a particular area of law, students and attorneys turn to hornbooks.
Often written by the same author who wrote the associated casebook, and published by the same company, "keyed" study aids are useful in distilling cases down to black-letter law.
Popular study aid product lines include Legalines, High Court Case Summaries, and Gilbert Law Summaries published by West Thomson Reuters, Casenotes Legal Briefs by Aspen, and the Understanding series and Q&A series by LexisNexis.