Library of Congress Control Number (LCCN)—What is it?

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What isÂan LCCN?

Assigned by the United States Library of Congress, an LCCN is a reference number used to locate the bibliographic data of a book published in the United States.ÂUnlike an ISBN, your LCCN does not refer to a specific edition or format, and can be used for hardcover, paperback, and subsequent editions of the same book.

Should I get an LCCN?

In a word: yes. One of the most important reaso...