THE DIAGNOSTIC MANUAL OF MISHEGAS (DMOM) is a delightful parody of the American Psychiatric Association's "Bible of psychiatry," the DSM (Diagnostic and Statistical Manual of Mental Disorders). In this playful send-up of the DSM, the authors-all of whom are distinguished writers with deep roots in the field of mental health-cut through the hundreds of categories in the 1000-page D.S.M. by dividing all mental disorders into two realms: mishegas major and mishegas minor. And for each of the sub-categories it analyzes-spilkes major (and spilkes minor), yenta, kvetch, alter kocker, shnorrer,...