Z:gnu-www-ja-using-gfdl--6ec751-Until recently, commercial boo/en

Until recently, commercial book publication almost always implied a nonfree book. But just as free commercial software has been increasing for a while, now free commercial documentation is starting to take off as well. Some of the major commercial publishers of documentation about the GNU/Linux system, and about free software in general, are now willing to publish books under the GNU FDL, and pay the authors in the usual way&mdash;IF the authors are firm about this.