A closed stack library contains books and other items that are not available for viewing or browsing by the general public. Many important libraries close their stacks of books to the public, limiting retrieval to professional library staff only (policies on who may use the collections varies). Most private, larger public, and university/academic/research libraries who have open stacks also have special collections that are closed. Reasons for having closed stacks vary, and include preventing theft, vandalism, and minimizing reshelving errors.
State of Arizona Research Library, a division of the Secretary of State of Arizona in Phoenix, AZ, which includes the Arizona Collection, the Federal Documents Collection, the Arizona State Government Publications Collection, a map collection, a law collection, and the largest collection of Arizona newspapers in Arizona.
↑"Closed stack". dictionary.com. Retrieved 2015-07-10. Having access to the stacks limited to the staff of the library or to a limited group of library users.
↑ Boston Athenaeum's Research Appointment Information for the Special Collections Reading Room
↑"The Fales Library & Special Collections". Fales Library. Retrieved 2015-07-01. We maintain a closed stacks reading room for scholarly access to our book collections, archival and manuscript collections, and media holdings.
↑ National Library of Finland mentions its closed stacks on their website
↑"Bookstacks Access". The Rare Book & Manuscript Library. Retrieved 2015-07-01. ... access to this area is restricted to faculty and graduate students of the University of Illinois and those patrons with special access cards
↑"Expectations in the Reading Room". Dartmouth Libraries. Trustees of Dartmouth College. Retrieved 17 February 2026. Except for reference stacks along the perimeter of the reading room, the Special Collections stacks are closed to browsing.