The Scorpion Rules (Prisoners of Peace series)

Nearly eighteen-year-old Greta, Duchess of Halifax, has spent most of her life at the Precepture as a Child of Peace. Like the children of other world leaders, she is held hostage under a system meant to prevent war: aggression by a nation can cost its leader’s child their life, while refusal brings destruction by Talis, the artificial intelligence that designed the system. When Elian, a new hostage, resists the rules, Greta confronts the system’s cruelty and the changing behavior of the Abbott, another artificial intelligence.