The Database of Additional Information

Book lovers are ravenous for information about books. Reviews of books are a very popular feature, and many people read them before deciding to purchase a book. Your main <Catalog> database is going to be supplemented by a file of additional information, and your next step is to describe the structure of that data.

The entries in this database will have the following form, and all of them will contain text:

ISBN—The international reference code for the book. This will be the field that's common to the database of books and will be used for cross-referencing.

Publisher's description—A description of the book written by the publisher.

Author's description—A description of the book written by the author.

The ...

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