This book provides law teachers with a relatively simple, easy to use casebook to teach U.S. international taxation. The field is notoriously complex, more so, perhaps, than any other area of Federal tax law. The focus is on how the details of the tax law fit into a broader structure, which is described in the introduction. Enables students to fit the particular issues they are working on into a larger context, to develop an intuition for where the problem areas may lie. This new edition is updated to reflect numerous changes in the law since the second edition, including new provisions enacted in August 2010.