Ithaka S+R has released Finding the Public Domain: The Copyright Review Management System .
Here's an excerpt from the announcement:
The project team documented these lessons in a book called Finding the Public Domain: Copyright Review Management System Toolkit. The Toolkit shares practical insights gained in this effort in the hope of supporting others interested in copyright review. This brief complements the practical toolkit. It explains the history of CRMS and introduces the basics of the CRMS procedure. It then discusses some of the lessons, successes, surprises, and challenges of the work.