A bit slow in getting under way, but once started, Seabury succeeds in making his thesis of practical interest, his suggestions of practical help to the vast army of chronic worriers -- and to the occasional worrier as well. He analyzes the subject from the psychological and physiological angles -- then proceeds to indicate the dangers, give suggestions as to corrective ""exercises"" and gradually to route one to the point where worrying can be harnessed to serve a useful end. Dr. Seabury has an established market.