The book is composed of chapters written by prominent scholars and researchers who have had the opportunity to work with Dr. Maher as colleagues, collaborators, and former students, as well as a chapter by Dr. Maher himself. Early on in his career, Dr. Maher established that, despite the challenges encountered in working in the field of psychopathology, methodological concerns applied to this field were not inherently different from the principles already worked out in the experimental laboratory. By continuing to focus on the questions of how one conducts a particular study and how to measure the phenomenon of interest, empirical study of issues in experimental psychopathology has become more methodologically rigorous and scientifically sound. The contributing authors not only explain how Dr. Maher’s work and ideas have contributed to the development of their own research efforts but also describe the broader impact he has had on those who have had the privilege of knowing him personally.