One of science fiction's greatest literary talents, Nancy Kress, returns in this captivating, beautifully written, novella, " After the Fall, Before the Fall and During the Fall", about the aftermath of a near future ecologically-caused collapse of human civilization, resulting in a mere twenty-four survivors inhabiting "The Shell", an enclosed habitat constructed by aliens, the Tesslies, who have granted the inhabitants the ability to travel briefly backward in time, to kidnap youngsters as additional inhabitants of "The Shell", hoping to increase humanity's slim chance at survival. A brilliant mathematician and FBI consultant, Julie Khan, develops an algorithm predicting when future kidnappings will occur. Her own imminent fate as well as those of "The Shell" inhabitants will converge in surprisingly unexpected ways. Kress has offered a psychologically rich thriller, with characters as rewarding as Julie Khan and Pete, one of six children born within "The Shell". Hers is among the most emotionally gripping and plausible tales of a near future dystopia that I have seen published recently, and one worthy of a wider readership, including one that extends beyond a traditional audience of science fiction fans. Anyone interested in reading or writing dystopian science fiction should view Kress' latest work as required reading.