The International Standard Book Number (ISBN) is a unique identifier for books. An ISBN is not mandatory, and does not provide copyright on a work. It is used internationally across the book trade and library sector.

Apply for an ISBN

ISBN Agency
PO Box 42
Prahran, VIC 3181

Tel: +61 3 6185 0043

Further information is available at Thorpe-Bowker's My Identifiers homepage.