Interest in the metacognitive dimension of emotional disorders has always been a focus of interest in the history of clinical psychology. Sigmund Freud, B. F. Skinner, Carl Rogers, Albert Ellis, Aaron beck, John Mahoney, and many others have written extensively about how people process their thoughts and emotions. However, there has not yet appeared a fully explicated theory of metacognitive processes, especially regarding emotional disorders. Therefore this work attempts to fill that void. It provides a theory of metacognitive processes, it explains in detail the complexities of these processes, and provides a framework for how to apply the theory in clinical practice. This book is written mostly for psychologists, but can also be read by all those who are interested in psychological matters