Copyrights can be a confusing issue for newer writers. It doesn't help that much of what's out there that attempts to explain the subject is confusing and contradictory.
We've found a terrific resource that will make everything clear and easy to understand. It's from a group called The Copyright Alliance, and it's simple, to the point and authoritative. It's also free!
Here are the links you need:
COPYRIGHT BASICS FOR WRITERS (PDF Document)
An alternative to traditional copyright is Creative Commons. If you'd like to create material that can be shared more freely, this may an excellent route to take. Find out more about Creative Commons here: