The schizoid personality disorder is one of the most interesting yet least known personality disorders. The concept of schizoidism has a fluctuating history that begins with schizophrenia and touches on other issues, such as autism spectrum disorders. People with schizoidism are very reserved in interpersonal relationships and in experiencing stronger emotional worlds. In addition to findings from empirical research, this book focuses on case studies regarding the psychodynamics of schizoid patients, their creativity, as well as the challenges of psychotherapy and treatment.