This book presents Tazkiya therapy, a holistic psychological approach based on Quranic guidance and rooted in the understanding of human beings as multidimensional, i.e., physical, psychological, social, and spiritual beings. The book starts with a detailed explanation or the object, the process, and the purpose of Tazkiya therapy along with an account of the boundaries and the enabling factors of the approach. Rather than a singular theoretical framework, Tazkiya therapy is a dynamic and flexible approach that integrates multiple frameworks and disciplines to grow the human soul, cognition, emotion and behavior. Although it’s a multidimensional approach, the process of therapy is step-by-step and the middle part of the book presents the key stages in the protocol. Within these steps, the therapist is given seven different approaches that they can customize with the needs of the client depending on whether they need assistance with thinking patterns, emotional disturbance, a behavioral problem, or a dysfunctional nervous system. The book ends with a comprehensive summary of the model, a series of case studies, future outlook about training and application for continuing the study and the practice of Tazkiya therapy. This book, based on the foundation that Tazkiya therapy covers issues that are spiritual in nature and always connects to Allah in facilitating the healing process, will fulfill the needs of practicing Muslim psychologists, psychiatrists, students of psychology and Islām studies.