How and why do librarians cover their dust jackets with plastic

Some people find book jackets, aka dust jackets or dust covers, annoying, but most librarians want to keep and protect these covers on the books that have them for several reasons.

Don't Hate on the Dust Jacket - The Atlantic

The Book Doctor Is In: Protecting Hardcover Books, 55% OFF

Value Added: Book Covers Provide Additional Impetus for Academic

How To: Protect a Hardcover Dust Jacket

Protecting a Dust Jacket with an Archival Polyester Sleeve

How to Organize, Clean, and Maintain Cookbooks

213 A0 Size Images, Stock Photos, 3D Objects, Vectors, 52% OFF

The Book Doctor Is In: Protecting Hardcover Books, 55% OFF

3 Ways to Cover a Paperback Book With Clear Plastic Film - wikiHow

Dust Jackets for Books - An Author's Guide (plus 10 Examples

Libraries Are Meeting the Needs of Their Communities With More

Ex-Library Books: Removing Library Markings and Covers - The Book