Amongst the Betrayed (Shadow Children)

In a society that allows no more than two children per family under penalty of death, third children are forced into hiding, or to live with false identity papers. In Among the Impostors, Nina Idi was arrested for supposedly trying to trick the Population Police into arresting students she said were third children. Now she faces torture or death -- unless she agrees to betray three other imprisoned third children. Her dilemma intensifies when she meets the prisoners -- who are only ten, nine, and six.