The sixth edition tracks contemporary trends in property law with particular attention to emerging issues of environmental sustainability. The sixth edition continues to use the problem method because lawyers attempt to solve specific problems. The problem-based structure of the casebook comports with the student learning outcomes and assessment approach emphasized in recent years by the American Bar Association And The Carnegie Endowment report. The sixth edition also provides a comprehensive introduction to Intellectual Property law. The novel legal problems raised by advances in technology demand that students receive early exposure to this area of law. This edition also emphasizes a planning perspective. The first-year of law school tends to focus on controversies and may mislead students into thinking that lawyers spend all their time resolving controversies when most lawyers devote substantial time to planning.