Clinical psychology is the branch of psychology concerned with the assessment and treatment of mental illness, abnormal behavior and psychiatric problems. This field integrates the science of psychology with the treatment of complex human problems, making it an exciting career choice for people who are looking for a challenging and rewarding field. American psychologist Lightner Witmer first introduced the term in a 1907 paper. Witmer, a former student of Wilhelm Wundt, defined clinical psychology as “the study of individuals, by observation or experimentation, with the intention of promoting change.” Today, clinical psychology is one of the most popular subfields within psychology. Clinical psychologists often work in medical settings, private practice or in academic positions at universities and colleges. Some clinical psychologists work directly with clients, often those who suffer from severe psychiatric disorders. Clinical psychologists who work as psychotherapists often utilize different treatment approaches when working with clients. The book will be an indispensable source for all professionals, researchers and students in this subject and for anyone working in the related areas for acquiring an up-to-date overviews.