Hugo Münsterberg was a German-American psychologist. He was one of the pioneers in applied psychology, extending his research and theories to industrial/organizational (I/O), legal, medical, clinical, educational and business settings.
Not to be confused with Hugo Munsterberg, an expert on Far Eastern art.
This book covers the beginnings of psychotherapy, but is so old and written in such a way as to be both a tough and near useless read. If this is an area of interest of study, it might be ok for context, but there are much better choices out there.