Slip by David Estes

In a future ruled by ruthless population laws, unauthorized births are terminated to keep society in balance. When a high-ranking official secretly spares his illegal newborn, the child grows up in hiding, setting off a chain of events that draws a privileged teen into his orbit and forces both to confront the morality of the system. As sanctioned and forbidden lives collide, they uncover dark truths about their families and government and are pushed toward choices that could ignite rebellion.