Continuing the tradition that has made it a leader in its field, this casebook uses problems to provide an overview of lawyers' professional responsibility. One of the most rapidly changing fields in American law, professional responsibility sees new issues, rules and cases each year, all of which are covered in this book. The authors have carefully designed this Thirteenth Edition to be familiar to long time users, and accessible to new ones. It continues its tradition of offering the most usable and up-to-date course materials to teach legal ethics and the law governing the practice of law. The new Thirteenth Edition provides resources to help law teachers address the many changes in the legal profession and professional responsibility law since the last edition in 2014. Among those changes are: ABA adoption of Model Rule 8.4(g) that forbids ""harassment or discrimination by lawyers on the basis of race, sex, religion, national origin, ethnicity, disability, age, sexual orientation, gender identity, marital status or socioeconomic status in conduct related to the practice of law."" Efforts to expand the availability of legal services to poor and middle-income persons who do not now use lawyers. Changing methods of delivering legal services, both those used by traditional law firms and services proposed by non-traditional providers. Changes in discovery rules and other procedural requirements that create new lawyer obligations to opponents and the court, Efforts to simplify and clarify rules relating to lawyer marketing. Use of judicial ethics rules to define Constitutional due process requirements that lawyers may raise on behalf of their clients.