website introduction：Guide to used book sales, fairs and other used book events throughout the USA and Canada
website introduction：Enables applications to be made for ISBNs, SANs, and ISMNs in the United States and Puerto Rico, and provides information about the standards.
website introduction：Includes a user's manual, prefix ranges, details of group agencies, publications, reports, and news.
website introduction：Information and tools for using International Standard Book Numbers. Scan them with a CueCat, look them up, or search them.