In 1995, Marcia Lawrence was a vibrant and accomplished 49-year-old. An educator, she had written books and hosted TV and radio shows. But one afternoon, without any warning, she descended into a seventeen-day pyschotic hell that changed her life. She found herself tormented by bizarre hallucinations. "Had it not been for a loving rescue by friends, an artful diagnosis, my own perserverance, and an incredible amount of luck, " she says, "I doubt that I would have survived." As Lawrence discovered, she had suffered from estrogen deprivation, a debilitating disease for women who react...