Here are some books you might want to consider looking at:
Complete Copyright for K-12 Librarians and Educators by 
Copyright for Teachers and Librarians in the 21st Century by United States Copyright Office: Library of Congress
http://www.copyright.gov
This official site for the United States Copyright Office includes general information, official notices, copyright laws, applications and answers to frequently asked questions.
U.S. Copyright Office Forms
http://www.copyright.gov/forms
Official site for printable and downloadable forms from the Copyright Office. You must have the latest Adobe Acrobat Reader (r) installed on your computer to view and print the forms. Some forms can be filled in and submitted online.
How to Investigate the Copyright Status of a Work
www.copyright.gov/circs/circ22.pdf
General information about searching copyrights from the Copyright Office. The databases require telnet.
Copyright Clearing Center, Inc.
http://www.copyright.com
Formed in 1978, the CCC is the largest licenser of photocopy reproduction rights. The site allows researchers to browse various databases containing U.S. copyrights.
Cornell Copyright Information Center: Copyright Term and the Public Domain in the United States
https://copyright.cornell.edu/publicdomain
This table lists copyright terms and when works become part of the public domain.
Creative Commons
http://creativecommons.org
Authors are given resources to offer licenses to others, as long as the original author receives credit for the creation.
General Copyright
http://www.ala.org/advocacy/copyright
From the American Library Association, a directory of links pertaining to copyright.
University of Texas: Copyright Crash Course
https://guides.lib.utexas.edu/copyright
User-friendly copyright tutorial created by the staff at the University of Texas at Austin.
