This book is copyright Robert G. Brown, 2003. It is provided under a modified Gnu Open Publication License. Please read the license before redistributing this book in any form -- an explicit agreement with the author is required for certain kinds of redistributions. The license does make the book generally available for unlimited personal use and non-profit distributions (for example, distributing paper copies to a class for free or at cost). The "cost" is that you'll owe the author a beer should you ever encounter him, thirsty, on some street corner.
If you like or dislike the book and would like to say so, wish to redistribute a version in any medium to be sold at a profit, would like to contribute or comment on material, or just want to say hi, feel free to contact the author