The current volume is the third edition of this classic monograph, which is devoted exclusively to the often ignored, often misunderstood, complex patellofemoral joint. The previous edition appeared in 1990. The current edition is timely and maintains the format and presentation of its predecessors. The new chapters are welcome additions and include those on history-taking and physical examination, arthroscopy, and non-operative treatment. The text is extremely readable and concise, but perhaps its greatest strength is that each chapter can stand alone.