Here is a link to a great comic book written about fair use and copyright infringement.
The comic was produced by Duke’s Center for the Study of the Public Domain. According to its website, the center “focuses on the delicate balance between intellectual property and the public domain - the realm of material that is free to use without permission or payment.“ The comic is not only amusing and interesting to read, but is also helpful in discussing the limits of fair use. Like any legal test, the fair use factors are much easier to repeat than to explain. The comic gives meaning to the factors with examples from real cases. It could be a great resource when you are explaining fair use to a client.
My hat is off to the folks at Duke.