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Lookup by ISBN is a free search tool for finding books by ISBN, title, author, publisher, subject, andkeywords. It provides catalog information, reviews, and similar books. In addition it offers you various and the best deals on books.

AbeBooks is your source for Used, New, Rare and Out of print books. Find classic collectibles, rare signed editions, used textbooks, and inexpensive bestsellers from independent booksellers worldwide.

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Search engine that finds the best buys from among 150 million new, used, rare, and out-of-print books for sale. Includes textbooks and international titles.

Welcome to the U.S. ISBN Agency, the official source for ISBNs in the United States. No other source can assign legitimate ISBNs to US publishers. Bowker provides technical advice on uses of the ISBN standard to the publishing industry.  Also in...

Biblio brings together thousands of independent booksellers worldwide to offer you over 50 million used, rare, out-of-print, signed and first edition books and textbooks. Searching is done by author, title, keyword, or isbn number. Search Biblio for ...

Campus Books carries over 8 million new and used college textbooks in one convenient location. We

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The Library of Congress collections include over 110 million items in a variety of formats and languages. The catalog information for many of these items has appeared in a number of traditional card catalogs located in the Library. Much of the inf...