What is Copyright Law?

Copyright http://www.wipo.int/copyright/en/  

Copyright Basics - https://www.copyright.gov/circs/circ01.pdf

Frequently Answered Questions on Copyright http://www.wipo.int/copyright/en/faq_copyright.html

Line between copying something and making something original:

The Copyright Question: The Difference Between Inspiration and Infringement - https://www.business.com/articles/the-copyright-question-the-difference-between-inspiration-and-infringement/
Graphic Design Copyright Laws: Inspiration vs. Infringement - http://www.howdesign.com/featured/graphic-design-copyright-laws-inspiration-vs-infringement/