"A real spinner!... Michael is a 'fragile' boy—one of a seemingly small number of children who grow tired when they run, who bleed when they are hurt, who can't take off their heads... As the fragile children discover each other, probe in the moldering ruins of London, and try to interpret what they find, they come to the conclusion that they have been created by some super-scientist, as guinea pigs for an experiment.
"And what happens if the guinea pigs turn on their creator—on the Overman of the legend they all know? They may be destroyed. They may be set free. They may escape. And who or what are the others, the 'drybons' who do not bleed, who can take off their heads? Edmund Cooper has secrets he can hide as well from you as from the fragiles..." —A. Schuyler Miller, Analog