Heinlein, Robert A. Friday (New York: Holt, Rinehart and Winston, 1982) 368 p.
Professor Perry is "a fatherly old dear" and Head Librarian for the employer of the title character. He is responsible for a paper library in addition to computers with access to the collections of Harvard, the British Museum, and the Washington Library of the Atlantic Union (formerly LC? this is in the future). Friday finds that she can be searching for information on the history of Vicksburg and, through cross references, find material on spectral types of stars (p. 229).