Self-help is big business, but alas not a scienti c business. The estimated 10 billion--that's with a "b"--spent each year on self-help in the United States is rarely guided by research or monitored by mental health professionals. Instead, marketing and metaphysics triumph. The more outrageous the "miraculous cure" and the "r- olutionary secret," the better the sales. Of the 3,000 plus self-help books published each year, only a dozen contain controlled...