Organizations need to contend with issues related to disruptive psychopathological behavior that in years past may have been swept under the rug. Also, clinicians are more aware that their clients′ mental health concerns are influenced by the workplace and that treatment without regard to what happens at work is not apt to be successful. The Handbook of Mental Health in the Workplace explores how psychological disorders impact the ability to work and recommends treatments and their likely side effects. It is designed to give the mental health clinician, I/O psychologist, and human resources manager the information they need to determine the employee′s fitness for work and what, if any, accommodations may be needed.