Comic Book Comics, by Ryan Dunlavey and Fred Van Lente, chronicles the history of comics in comic-book form. Their latest story, posted in full at their blog, is a short history of copyright grabs by comics publishers, featuring Superman creators Jerry Siegel and Joe Shuster. Jack Kirby and Joker creator Jerry Robinson make appearances as well. It's interesting history and a painless way to learn a bit about copyright law and its pitfalls.
(Via Comics Worth Reading.)