Duke's Center for the Study of the Public Domain has released Intellectual Property: Law & the Information Society—Cases and Materials. Also available in paperback.
Here's an excerpt from the press release:
This book is an introduction to intellectual property law, the set of private legal rights that allows individuals and corporations to control intangible creations and marks-from logos to novels to drug formulae-and the exceptions and limitations that define those rights. It focuses on the three main forms of US federal intellectual property-trademark, copyright and patent-but many of the ideas discussed here apply far beyond those legal areas and far beyond the law of the United States.