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Views, anecdotes and insights into the world of antiquarian books.

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Illustrated Glossary

What book dealers really mean. Click on thumbnails for larger images.

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

12mo.

Not "a dozen more," but in the book world used as an abbreviation for a duodecimo, a small book (a little smaller than a mass market paperback), whose printed paper sheets were folded in such a fashion as to make twelve leaves (24 little pages) from one large sheet. And yes, it is sometimes pronounced "twelve-mo." Beatrix Potter's famous Peter Rabbit books, such as this nice example from our Catalog 84, were printed as 12mo's.

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

More Reference

Want to learn more about rare books and collecting? Here are a few references to get you started...