Cory Doctorow via Flickr/Creative Commons
Attorney Helen Sedwick answers reader questions on some finer points of copyrights, including when to copyright your work and when to seek permission to use someone else's: "Many people make the mistake of thinking that giving credit to the original illustrator, photographer, or writer is enough to protect them from a claim of copyright infringement. It’s not. If the original image or other work is subject to copyright, then assume you need to get permission to use it."