Answered By: APUS Librarians
Last Updated: Nov 25, 2018     Views: 2854

An ISBN (International Standard Book Number) is a unique identification number for a book Read more about ISBNs here.  If you have an ISBN number for a book, you can use it to locate that book:

Note: if you're looking for your course textbook, check here.

An ISSN (International Standard Serial Number) is a unique identification number for a periodical.  Read more about ISSNs here.  Note that this number identifies the larger publication - not the individual articles within it.   If you have an ISSN number, you can locate that periodical:

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