In articles, interviews, op-eds and testimony on Capitol Hill, Wendell Potter has described the dark underbelly of the health care insurance industry - unkept promises of care, canceled coverage of those who get sick and fearmongering campaigns designed to quash any change that might adversely affect profits. He should know what he is talking about. For 20 years, Mr. Potter was the head of corporate communications at two major insurers, first at Humana and then at Cigna. Now Mr. Potter has written a fascinating book that details the methods he and his colleagues used to manipulate public opinion and describes his transformation from the idealistic son of working-class parents in eastern Tennessee to top insurance company executive, to vocal critic and industry watchdog. Using little of the fiery rhetoric or lurid prose that usually marks corporate exposs or memoirs of redemption, the book, Deadly Spin ... is an evenhanded yet riveting account of the inner workings of the health care insurance industry, a cautionary tale that doctors and patients would be wise not to miss. Mr. Potter [describes] the myth-making he did, interspersing descriptions of front groups, paid spies and jiggered studies with a deft retelling of the convoluted (and usually eye-glazing) history of health care insurance policies.