From Wall Street Journal bestselling author Joe Hart.

A mysterious worldwide epidemic reduces the birthrate of female infants from 50 percent to less than 1 percent. Medical science and governments around the world scramble in an effort to solve the problem?? but twenty-five years later there is no cure?? and an entire generation grows up with a population of fewer than a thousand women.

Zoey and some of the surviving young women are housed in a scientific research compound dedicated to determining the cause. For two decades?? she??s