This monograph describes what is being done by librarians to preserve and restore books, manuscripts, and archival materials. It discusses the following problems: (1) flattening of folded documents; (2) the methods used by librarians to restore collections damaged by fire and water. Included is a summary of some of the procedures by the librarians at the Jewish Theological Seminary of America library and in Florence to restore damaged collections. Among the methods discussed are quick freezing and drying in microwave ovens; (3) restoration of documents is discussed with reference to the following procedures: (a) silking; (b) tissue process; (c) washing and bleaching; (d) inlaying, framing and glazing; (e) sprays; (f) lamination and laminating films.