"Mastering Competencies in Family Therapy: A Practical Approach" by Diane R. Gehart is a comprehensive textbook published in 2009 by Brooks/Cole. It covers a range of topics related to family therapy, including psychotherapy, counseling, nursing, and teaching methods. The book offers a practical approach to mastering competencies in family therapy, with 528 pages of valuable insights and strategies. With its convenient trade paperback format and affordable price of $44.09, this textbook is a valuable resource for students and professionals in the field of family therapy.