We work with a lot of public library reference librarians and library assistants and are always on the lookout for materials that could help them help their public library patrons who ask legal reference and legal research questions.
One day we’ll write that quick and dirty legal reference guide for public libraries, but in the meantime, the Drake Law Library in Iowa has linked to, and annotated, a list of many of my favorite guides at their website that explain the unauthorized practice of law, differences between legal information and advice, and legal research techniques: