From De Gruyter's January 24 press release:
Posted by stemp003 at February 1, 2013 2:09 PM
The Max Planck Society and the academic publishing house De Gruyter have signed a groundbreaking agreement to cooperate in the publication of Open Access books. The agreement covers texts intended for publication by scholars at the more than 80 individual Max Planck institutes working around the world today. It encompass the full range of disciplines in which the Max Planck Society is active, including the natural sciences, social sciences, and humanities, and applies to both monographs and anthologies.
"Our collaboration with De Gruyter will enable us to offer our scholars a unified platform - both from a legal and an organizational perspective - for publishing books in Open Access," explains Ralf Schimmer, Director of the Department of Scientific Information Provision at the Max Planck Digital Library. "In this way, we're responding to an increasing number of requests from the Max Planck institutes, and are extending the support we give for Open Access publishing from journal articles to the arena of books."