Book excerpt: Dreeben-Irimia's Introduction to Physical Therapy Practice, Fifth Edition uncovers the “what,” “why,” and “how” of physical therapy. The text thoroughly describes who provides physical therapy, in what setting, and how physical therapists and physical therapist assistants interact with patients, each other, and other healthcare professionals. The Fifth Edition delves into the tools and competencies physical therapists and physical therapist assistants use to care for a diverse population of people in a variety of clinical settings. The book discusses what it means to practice legally, ethically, and professionally, including practical communication skills.