Dust jacket
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The dust jacket of a book is the detachable outer cover, usually made of paper and printed with text and illustrations. This outer cover has folded flaps that hold it to the front and back book covers
A dust jacket, propped up and partially unfolded for illustration
The back of a dust jacket, showing the ISBN
Front dust jacket art by Thelma Cudlipp for Don Marquis' Hermione and Her Little Group of Serious Thinkers, 1916.
Hardcover
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A hardcover, hard cover, or hardback book is one bound with rigid protective covers. It has a flexible, sewn spine which allows the book to lie flat on a surface when opened. Modern hardcovers may hav
Dust jacket
…simple binding, at a time when it was not feasible to print directly onto the binding. The role of a dust jacket has been largely supplanted by modern hardcover printing technologies, which print such information directly onto the binding. Modern dust covers still serve to display promotional material and shield…
A typical hardcover book (1899), showing wear
Old hardcover books at the Merton College library
The Holy Bible—Relievo leather‑bound edition (1864)
A King James Bible bound in blue faux-leather cloth