A brief overview of the functions of public relations in libraries introduces this manual, which provides an explanation of the public relations (PR) process, including fact-finding, planning, communicating, evaluating, and marketing; some PR principles; a 10-step program that could serve as a model for planning a PR program; a discussion of PR planning techniques; and some PR suggestions for Brazilian libraries based on the author's observations and discussions with Brazilian librarians, library educators, and students. A list of 19 references is attached. (RAA)