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ISBN stands for International Standard Book Number.

The ISBN (International Standard Book Number) is a 13-digit number that uniquely identifies books and book-like products published internationally. Each number identifies a unique edition of a publication, from one specific publisher, allowing for more efficient marketing of products by booksellers, libraries, universities, wholesalers and distributors.

ISBNs are assigned by ISBN group agencies in 166 countries, coordinated by the International ISBN Agency in London. The Australian ISBN Agency assigns ISBNs in Australia exclusively.

Thorpe-Bowker® acquired the Australian ISBN Agency in 1997, primarily to ensure the continuance of a resource of Australian books and publishers (Australian Books in Print) that would remain as comprehensive as possible.

The ISBN and Barcode application process is now online. To request an ISBN or Barcode please click here. (This link will take you to our secure online payment gateway. Please read all instructions carefully as the application system has changed)

For terms and conditions, see below.

ISBN Agency Thorpe-Bowker
Level One, 607 St Kilda Road
(PO Box 6509, St Kilda Road Central VIC 8008)
Melbourne VIC 3004

Tel: +61 3 8517 8349
Fax: +61 3 8517 8368

ABN: 77 097 830 745

Terms and Conditions
Payment Terms

Unless otherwise agreed in writing with Thorpe-Bowker all ISBN and Barcode requests must be paid before ISBNs/barcodes are despatched.

Online applications for ISBNs and Barcodes require payment via credit card. For other payment options please email requesting further details. A manual processing fee may be charged for orders not processed online.

Terms of Supply and Returns Policy

All goods and services are supplied on a firm-sale basis.

Thorpe-Bowker® reserves the right to withhold further goods and services from the customer in the event of any breach of any of these terms and conditions or sale or for any other reason which Thorpe-Bowker® considers warrants such action.

Thorpe-Bowker’s list prices are subject to change at any time and without prior notice.


All credit card transactions are secured using 128 Bit Secure Socket Layer (SSL) Encryption.

Contact Information

ABN 77 097 830 745
Email address:

Click here to purchase an ISBN

Click here to download a ISBN user manual

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