During the Microsoft Business Intelligence Conference 2007 we distributed a free printed copy of The Many-to-Many Revolution to attendees who visited our booth. Now the same book can be ordered on Lulu.com paying only the print and shipping costs (we don’t charge royalties).
If you often use the paper, you could appreciate the little format of the book. Lulu.com provides a very cheap service with a very good ratio of quality for price. The content is the same of the PDF I published in September 2006. The PDF is freely downloadable here since then.
We got good feedback about the book format, thus we made it available as a book to everyone.