<p data-pm-slice="1 1 []">Publishing a book, journal, magazine, or other publication? ISBN ISSN registration helps publishers identify the correct standard number for their publication. ISBN is generally used for books and book-like publications, while ISSN identifies serial publications such as journals and magazines. Choosing the appropriate identifier depends on the publication format and publishing plan. Applicants should review the applicable guidelines and prepare accurate publication details before applying. Agile Regulatory offers professional guidance to help publishers understand registration requirements and organize the information needed for the relevant application.