This workbook provides an introduction to the library of St. Louis Community College at Florissant Valley and its online catalog system, LUIS (Library User Information Service). A description of the arrangement of the library is followed by instructions for using the online catalog, including searching by author, title, or subject, and information on: (1) how to locate books and nonprint material on the shelf; (2) the reference collection; (3) use of periodical articles and how to locate them; (4) how to locate and use newspaper articles; (5) the vertical file; (6) reserve materials; (7) circulation regulations; (8) the Career Information Center; and (9) reference services. Library floor plans, sample LUIS screens, and examples of index entries supplement the text. Workbook exercises designed to help develop skills in using the library's resources are also provided. (KM)