The book was originally published in 2004, and in a revised edition in 2005, by Piet Zwart Institute, Waag Society and Creative Commons Nederland. A PDF is available here.
What is copyright? What is copyleft? How can we share culture in a world where everything has a license?
Scientists, writers, designers, artists, musicians and others are increasingly interested in making their work available in ‘the public domain’.
When this booklet was published in 2004, it provided the first overview of the ways in which this has been done and a guide to the growing area of Open Content Licenses through which people design and safeguard access to their work.