Preservation must be a major concern of the entire library and special collections populations, with special collections management addressing it to the best of their abilities within their institutional context, in a world where theft of special collections materials is a daily possibility. The “Guidelines for the Protection of Rare Books, Manuscripts, and Other Special Collections,” published here by the ACRL/Rare Books and Manuscripts Section (RBMS) PreservationCommittee is the primary ACRL document dealing with the preservation of library materials.These guidelines outline key issues that all collection administrators should consider when establishing adequate collection protection. While the subjects are geared toward rare books, special collections, and manuscripts, they can also be applied to common collections. The RBMS Security Committee strongly recommends that these recommendations be followed, including the labeling of items with unique identifiers and the appointment of a Library Security Officer (LSO).