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.
The dust-jacket considered
Value Added: Book Covers Provide Additional Impetus for Academic Library Patrons to Check Out Books, Knowlton
The Book Doctor Is In: Protecting Hardcover Books, 55% OFF
The dust-jacket considered
Dirty Laundry Pile (Paul B. Janeczko) (Poetry) -hardcover – Encore Kids Consignment
213 A0 Size Images, Stock Photos, 3D Objects, Vectors, 52% OFF
The Afterlife of a DNL Dust Jacket – The DNL Report
In Jacqueline Winspear's 'The American Agent,' Maisie Dobbs investigates a murder amid the Blitz
The Afterlife of a DNL Dust Jacket – The DNL Report
Surprise, Surprise! Exploring Dust Jackets, Case Covers, and Endpapers in Picture Books to Support Comprehension - McNair - 2021 - The Reading Teacher - Wiley Online Library
Dirty Laundry Pile, Personification Poems in Different Voices, Paul B. Janeczko
Get your (dust) jacket on Library & Information Technology Services
Book care and storage - Preservation Equipment Ltd
Draplin Design Co.: DDC-164 Everything Else Enhancement Kit
Why do books have a dust jacket?