UNESCO celebrates World Book and Copyright Day on April 23, an annual event where libraries around the world promote reading and the enjoyment of books.
Copyright is closely linked with the book publishing industry but is also relevant to us all when we are looking for content to reuse in the things we create. It is important to give credit where credit is due and provide the correct attribution details when you use the words, images or ideas of someone else.
When I am looking for free images to use in my work I like to use Google Advanced Image Search, Flickr Advanced Search or Wikimedia Commons. These tools allow you to limit to Creative Commons licensed or public domain content. Creative Commons is an organisation that supports the sharing and use of creativity and knowledge and even has tools that make creating licenses for your own content easy.
These tools are good because they make it easy to find what you need without worrying about the complicated stuff.