As a pediatric surgeon, Catherine Musemeche operates on the smallest of human beings, manipulates organs the size of walnuts, and uses sutures as thin as hairs to resolve matters of life or death. Working in the small space of a premature infant's chest or abdomen allows no margin for error. It is a world rife with emotion and risk. Small takes readers inside this rarefied world of pediatric medicine, where children and newborns undergo surgery to resolve congenital defects or correct the damages caused by...