Major treatises are often written by highly respected legal scholars and practitioners. They are among the most valuable secondary resources because they analyze the existing common law and may promote areas of legal reform. They are useful as a first place to begin your legal research because they typically provide links to significant cases and laws in the topic. They may also provide extensive bibliographies to other other helpful resources on the topic. Multivolume treatises usually do not circulate but you may have access to them from Lexis, Westlaw or other online resources.