This information packet on quasars consists of an introductory paper, four articles from "Mercury," a journal of the Astronomical Society of the Pacific, and a bibliography. Methods used to measure distances in the universe and the nature of quasi-stellar objects (QSO's), the name preferred by many workers in the field, are discussed in the first article, "Cosmic Distances and QSO's" (Joe S. Tenn). Such areas as radio-quiet quasars, non-cosmological redshifts, absorption features in quasars, a quasar model, and the search for a plausible source of energy to power quasars are discussed in "Quasi-Stellar Objects" (Harding E. Smith). A brief history of quasars is also provided. The nature and probable cause of redshifts in quasars is the subject of "Quasars with Fuzz" (Bruce Balick). Phenomena associated with a particular quasar which may provide important clues to the understanding of quasars and their evolution are considered in "4C18.68: A Quasar with Precessing Jets" (Ann C. Gower and John B. Hutchings). A short bibliography of nontechnical books and articles is appended. (JN)