The OCG issues and distributes professional publications regularly. The volumes of the OCG book series have been issued since 1976 and since 1999 they have been published under the name books[at] So far approximately 300 volumes have been published.
The OCG also publishes a magazine for its members and an annual report.

OCG as publisher

Publishing activities of the OCG...

OCG Bookshop

You can order all available books of the OCG book series in our new Webshop...


OCG Journal

The official OCG magazine provides members with news and insights.   


OCG Annual Report

The OCG Annual Report is published once a year and distributed to all OCG members.