The Penguin Classics Book
The Penguin Classics Book, edited by Henry Eliot / ISBN 9781524705879 / large 460-page hardcover
This is something of a high-end publisher catalog, but excellent if you love Penguin or love browsing publisher catalogs (like I do). If you want to mainly look at cover designs, check out Classic Penguin: Cover to Cover
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A historic guide to the world of Penguin Classics from its UK origin, covering a span from the ancient world to World War I, in a luxurious orange clothbound package with colored endpapers, full-color pages, and illustrations.