Responses to a one-page questionnaire on library security were received from 89 of 117 Association of Research Libraries (ARL) institutions (76%). The questions, which covered administrative security control, security policies and procedures, permanent identification of library materials, and swift responses to possible theft were derived from a longer questionnaire prepared by the Security Committee of the Rare Books and Manuscripts Section of the Association of College and Research Libraries (ACRL). It was found that 31% of the responding libraries had a security officer, 87% and 33% were marking their general and special collections respectively, 15% had a collection security policy, and most of the policies prescribed what to do about thefts after the fact. This publication contains (1) the two questionnaire forms; (2) security policy and procedure documents from Brown University, New York State Library, Colorado State University, Columbia University, Cornell University, Florida State University, University of Michigan, University of Toronto, McMaster University, and University of Californa, Riverside; and (3) task force reports on library security from Brigham Young University and University of Illinois at Urbana-Champaign. A six-item bibliography, a concise summary of survey results, and an evaluation sheet for this ARL Systems and Procedures Exchange Center (SPEC) kit are also provided. (ESR).