Its part of our committment to the Plone community to deliver
as much introductory material as we can for free.
ZopeMag has steadily increased the amount of free docs
we release (even thought the development was not free).
As our subscriber base grows we hope to be able to release
even more docs for free.
Another hail for you Mark!
UPDATE from Mark Pratt:
Thank you! I need to correct one minor bit. Peter Germain is
ZopeMag’s editor. I’m just his faithful sidekick ;-)