Why wouldn't you want to be screened to see if you're at risk for cancer, heart disease, or another potentially lethal condition? After all, better safe than sorry. Right? Not so fast, says Alan Cassels. His Seeking Sickness takes us inside the world of medical screening, where well-meaning practitioners and a profit-motivated industry offer to save our lives by exploiting our fears. He writes that promoters of screening overpromise on its benefits...