Fields of Law - an Introduction
Fields of Law is a nice page on the LSAC.org Web site that will introduce students to the variety of areas of practice in law. They also provide some interesting statistics, including the percentage of lawyers practicing in different sectors.
For something a bit more in-depth, I’d recommend “The Official Guide to Legal Specialties” showcased here to the right. I also have a copy of this book if anybody ever wants to borrow it.