This document is the copyright notice and introduction for a book on mathematical logic dedicated to the author's three sons. It states that the book is copyrighted to H. Jerome Keisler in 2000 and is licensed under a Creative Commons license allowing non-commercial sharing and adaptation with attribution. The copyright and license allow readers to view and share the content while protecting the author's rights.

2. Dedicated to my sons, Randall, Jeffrey, and Thomas
Copyright © 2000 by H. Jerome Keisler.
This work is licensed under the Creative Commons
Attribution-NonCommercial-ShareAlike License.
To view a copy of this licence, visit
http://creativecommons.org/licenses/by-nc-sa/2.0/
or send a letter to Creative Commons, 559 Nathan
Abbott Way, Stanford, California, 93405, USA.
Revised September 2007