How Libraries Get Rid Of Books

I’ve already covered bike riding and organic dairy farming today, so why not go for the best life trifecta and share some fun library facts while I’m at it?

More specifically, an excerpt of Phyllis Rose’s book, The Shelf, is up on Medium, and it pulls back the curtain on how libraries weed the stacks to get rid of unread books and make space for new ones. Turns out the correct word for this is “deaccession” and there is a SYSTEM. It is way more amazing than I could have imagined:

CREW stands for Continuous Review Evaluation and Weeding, and the manual uses “crew” as a transitive verb, so one can talk about a library’s “crewing” its collection. It means weeding but doesn’t sound so harsh. At the heart of the CREW method is a formula consisting of three factors—the number of years since the last copyright, the number of years since the book was last checked out, and a collection of six negative factors given the acronym MUSTIE, to help decide if a book has outlived its usefulness. M. Is it Misleading or inaccurate? Is its information, as so quickly happens with medical and legal texts or travel books, for example, outdated? U. Is it Ugly? Worn beyond repair? S. Has it been Superseded by a new edition or a better account of the subject? T. Is it Trivial, of no discernible literary or scientific merit? I. Is it Irrelevant to the needs and interests of the community the library serves? E. Can it be found Elsewhere, through interlibrary loan or on the Web?

MUSTIE books. Get it? I know some of you guys are librarians, can you confirm this acronym?

Also it gets even more complex:

Obviously, not all the MUSTIE factors are relevant in evaluating fiction, notably Misleading and Superseded. Nor is the copyright date important. For nonfiction, the CREW formula might be 8/3/MUSTIE, which would mean “Consider a book for elimination if it is eight years since the copyright date and three years since it has been checked out and if one or more of the MUSTIE factors obtains.” But for fiction the formula is often X/2/MUSTIE, meaning the copyright date doesn’t matter, but consider a book for elimination if it hasn’t been checked out in two years and if it is TUIE—Trivial, Ugly, Irrelevant, or Elsewhere.

Photo: nicokaiser

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